| | AddedJcastle | Prefecture | Visits | Contributor | Year Visited |
|---|
| Aizu Wakamatsu Castle | 1999 | Fukushima Prefecture | October 1997; January 1998; Sept. 14, 2003; July 17, 2011 | Eric | 1997
1998
2003
2011 |
| Akashi Castle | 2007 | Hyogo Prefecture | November 14, 2009 | Eric | 2009 |
| Akatsuka Castle | 2020 | Tokyo | May 4, 2019 | Eric | 2019 |
| Akayama Jin'ya | 2023 | Saitama Prefecture | June 4, 2023 | Eric | 2023 |
| Akita Castle | 2012 | Akita Prefecture | May 10, 2018 | | 2018 |
| Ako Castle | 2009 | Hyogo Prefecture | December 21, 2018 | Eric | 2018 |
| Akutagawasan Castle | 2013 | Osaka | December 23, 2016, October 30, 2022 | RaymondW | 2016
2022 |
| Amagasaki Castle | 2013 | Hyogo Prefecture | March 9, 2013 | | 2013 |
| Amidagamine Castle (Yamashiro) | 2022 | Kyoto | November 22, 2022 | ART | Viewer Contributed
2022 |
| Annaka Castle | 2018 | Gunma Prefecture | March 11, 2018 | | 2018 |
| Ansho Castle | 2009 | Aichi Prefecture | October 15, 2009 | Eric | 2009 |
| Aoyagi Castle | 2016 | Nagano Prefecture | November 1, 2015 | | 2015 |
| Aoyama Castle | 2015 | Saitama Prefecture | February 14, 2015 | | 2015 |
| Arato Castle | 2008 | Nagano Prefecture | October 16, 2008 | Eric | 2008 |
| Arikoyama Castle | 2013 | Hyogo Prefecture | September 26, 2013 | | 2013 |
| Asaba Castle | 2016 | Gunma Prefecture | October 18, 2015 | | 2015 |
| Asakura Yakata | 2023 | Fukui Prefecture | May 1-2, 2023 | Eric | 2023 |
| Ashigara Castle | 2010 | Shizuoka Prefecture | April 3, 2010 | Eric | 2010 |
| Ashikaga Masauji Yakata | 2023 | Saitama Prefecture | June 4, 2023 | Eric | 2023 |
| Ashikagashi Yakata | 2007 | Tochigi Prefecture | June 23, 2007 | Eric | 2007 |
| Asonuma Castle | 2017 | Tochigi Prefecture | November 25, 2017 | | 2017 |
| Asukayama Castle | 2022 | Tokyo | Dec 27, 2021 | Eric | 2021 |
| Asuke Castle | 2017 | Aichi Prefecture | August 4, 2019 | Furinkazan | 2019 |
| Ayukawa Castle (Koka) | 2023 | Shiga Prefecture | March 19, 2023 | Eric | 2023 |
| Azuchi Castle | 2004 | Shiga Prefecture | February 21, 2004; November 26, 2011; December 12, 2021 | Eric | 2004
2011
2021 |
| Bitchu Matsuyama Castle | 2004 | Okayama Prefecture | November 20, 2010 | Eric | 2010 |
| Chausudate | 2021 | Akita Prefecture | November 12, 2020 | Eric | 2020 |
| Chiba Castle | 2009 | Chiba Prefecture | June 20, 2009 | Eric | 2009 |
| Chigasaki Castle | 2009 | Kanagawa Prefecture | April 10, 2010 | Eric | 2010 |
| Chofuku Castle | 2018 | Tochigi Prefecture | April 30, 2018 | | 2018 |
| Dokanyama | 2022 | Tokyo | Dec 26, 2021 | Eric | 2021 |
| Eboshigata Castle | 2023 | Osaka | Dec 26, 2022 | Eric | 2022 |
| Edo Castle | 1999 | Tokyo | August 1992, many times since | Eric | 1992
2001
2003
2004
2011
2012
2013
2014
2015
2016
2017
2018
2019
2022
2023 |
| Fujihashi Castle (Tokyo) | 2015 | Tokyo | May 24, 2015 | | 2015 |
| Fukazawa Castle | 2014 | Shizuoka Prefecture | April 13, 2014 | Eric | 2014 |
| Fukuchiyama Castle | 2009 | Kyoto | November 5, 2021 | RaymondW | Viewer Contributed
2021 |
| Fukui Castle | 2006 | Fukui Prefecture | June 13, 2006 | | 2006 |
| Fukuyama Castle | 2006 | Hiroshima Prefecture | November 14, 2009 | Eric | 2009 |
| Funayama Castle | 2019 | Hiroshima Prefecture | November 7, 2018 | Eric | 2018 |
| Fushimi Castle | 2004 | Kyoto | July 8, 2022 | | 2022 |
| Futamata Castle | 2010 | Shizuoka Prefecture | January 12, 2020 | Eric | 2020 |
| Gassan Toda Castle | 2011 | Shimane Prefecture | November 19, 2010 | Eric | 2010 |
| Genbao Castle | 2023 | Fukui Prefecture | April 22, 2023 | Eric | 2023 |
| Gifu Castle | 1999 | Gifu Prefecture | July 1992; May 1996; Aug 2, 2019 | Eric | 1992
1996
2019 |
| Gion Castle | 2018 | Tochigi Prefecture | April 30, 2018 | | 2018 |
| Gobara Castle | 2016 | Gunma Prefecture | April 29, 2016 | | 2016 |
| Gochaku Castle | 2020 | Hyogo Prefecture | February 28, 2019 | Eric | 2019 |
| Gokan Castle | 2016 | Gunma Prefecture | October 18, 2015 | | 2015 |
| Goryokaku Fort | 2002 | Hokkaido | July 21, 2002 | Eric | 2002 |
| Goryu Castle | 2023 | Hiroshima Prefecture | Feb 24, 2023 | Eric | 2023 |
| Gujo Hachiman Castle | 2004 | Gifu Prefecture | February 22, 2004 | Eric | 2004 |
| Hachigata Castle | 2006 | Saitama Prefecture | March 25, 2006 | Eric | 2006 |
| Hachinohe Castle | 2010 | Aomori Prefecture | May 21, 2010 | Eric | 2010 |
| Hachioji Castle | 2002 | Tokyo | January 26, 2002; June 29, 2013; May 2, 2015 | Eric | 2002
2013
2015 |
| Hagi Castle | 2007 | Yamaguchi Prefecture | November 21, 2014 | | 2014 |
| Haibara Castle | 2016 | Nagano Prefecture | October 31, 2015 | | 2015 |
| Haiyama Castle | 2022 | Kyoto | June 3, 2022 | Eric | 2022 |
| Hakusan Castle | 2016 | Yamanashi Prefecture | October 12, 2015 | | 2015 |
| Hamada Castle | 2015 | Shimane Prefecture | November 23, 2014 | | 2014 |
| Hamamatsu Castle | 1999 | Shizuoka Prefecture | May 1999, January 12, 2020 | Eric | 1999
2020 |
| Hanawa Castle | 2017 | Chiba Prefecture | September 3, 2017 | | 2017 |
| Hanazono Castle | 2018 | Saitama Prefecture | April 1, 2018 | | 2018 |
| Hanazono Mitake Castle | 2018 | Saitama Prefecture | April 1, 2018 | | 2018 |
| Hasedo Castle | 2012 | Yamagata Prefecture | November 2, 2017 | | 2017 |
| Hattori Castle (Koka) | 2022 | Shiga Prefecture | February 25, 2022 | Eric | 2022 |
| Hayashikojo Castle | 2015 | Nagano Prefecture | October 31, 2015 | | 2015 |
| Hayashiohjo Castle | 2015 | Nagano Prefecture | October 31, 2015 | | 2015 |
| Higashi Maruoka Castle (Koka) | 2022 | Shiga Prefecture | April 1, 2022 | Eric | 2022 |
| Hikobe Yashiki | 2020 | Gunma Prefecture | March 22, 2020 | Eric | 2020 |
| Hikone Castle | 1999 | Shiga Prefecture | April 1996; February 21, 2004; March 1, 2019; October 8, 2021; Nov 3, 2022 | Eric | 1996
2004
2019
2021
2022 |
| Hikuma Castle | 2020 | Shizuoka Prefecture | January 12, 2020 | Eric | 2020 |
| Himeji Castle | 1999 | Hyogo Prefecture | Feb 1996; Dec 1997; Aug 1998; Mar 21, 2004; Nov 15, 2009; Mar 3, 2012; Oct 10, 2012; Dec 19, 2018; Feb 28, 2019; Mar 21, 2022; Feb 25, 2023; Aug 18, 2023; Sept 16, 2023 | Eric | 2009
1996
1997
1998
2004
2012
2018
2019
2022
2023 |
| Hirai Castle | 2017 | Gunma Prefecture | April 15, 2017 | | 2017 |
| Hirai Kanayama Castle | 2017 | Gunma Prefecture | April 15, 2017 | | 2017 |
| Hiratsuka Castle | 2021 | Tokyo | Dec 27, 2021 | Eric | 2021 |
| Hirosaki Castle | 1999 | Aomori Prefecture | April 1999, May 21, 2010 | Eric | 1999
2010 |
| Hiroshima Castle | 1999 | Hiroshima Prefecture | February 1996; November 23, 2014; November 9, 2018 | Eric | 1996
2014
2018 |
| Hishakuyama Castle | 2020 | Gunma Prefecture | March 22, 2020 | Eric | 2020 |
| Hiyama Castle | 2021 | Akita Prefecture | November 12, 2020 | Eric | 2020 |
| Horikoshi Castle | 2021 | Aomori Prefecture | November 11, 2020 | Eric | 2020 |
| Hoshigasaki Castle | 2022 | Shiga Prefecture | May 3, 2022 | Eric | 2022 |
| Ibaraki Castle | 2014 | Osaka | October 19, 2014 | | 2014 |
| Ichijodani Castle | 2013 | Fukui Prefecture | May 1-2, 2023 | Eric | 2023 |
| Ichijodani Kojo Castle | 2023 | Fukui Prefecture | May 1-2, 2023 | Eric | 2023 |
| Ichijodaniyama Castle | 2023 | Fukui Prefecture | May 1-2, 2023 | Eric | 2023 |
| Ichijojiyama Castle | 2022 | Kyoto | October 24, 2021 | Eric | 2021 |
| Iga Ueno Castle | 2007 | Mie Prefecture | Oct 8, 2012 | | 2012 |
| Iimori Castle | 2023 | Osaka | February 26, 2023 | Eric | 2023 |
| Ikeda Castle | 2012 | Osaka | March 9, 2013 | Eric | 2013 |
| Imabari Castle | 2001 | Ehime Prefecture | October 19, 2001 | Eric | 2001 |
| Imai Castle | 2015 | Tokyo | May 24, 2015 | | 2015 |
| Ina Yashiki | 2022 | Saitama Prefecture | April 8, 2022 | Eric | 2022 |
| Inatsuke Castle | 2015 | Tokyo | October 26, 2015 | | 2015 |
| Inawashiro Castle | 2011 | Fukushima Prefecture | July 18, 2011 | Eric | 2011 |
| Inoue Yakata (Shiga) | 2023 | Shiga Prefecture | May 3, 2022 | Eric | 2022 |
| Inukai Castle | 2016 | Nagano Prefecture | October 31, 2015 | | 2015 |
| Inuyama Castle | 1999 | Aichi Prefecture | July 1992; May 1996; February 22, 2004 | Eric | 1992
1996
2004 |
| Ishigakiyama Ichiya Castle | 2009 | Kanagawa Prefecture | October 12, 2009 | Eric | 2009 |
| Isobe Castle | 2018 | Gunma Prefecture | March 11, 2018 | | 2018 |
| Itabashi Castle | 2022 | Tokyo | Dec 27, 2021 | Eric | 2021 |
| Itami Castle | 2013 | Hyogo Prefecture | March 9, 2013 | | 2013 |
| Iwabitsu Castle | 2016 | Gunma Prefecture | April 29, 2016 | | 2016 |
| Iwadono Castle | 2011 | Yamanashi Prefecture | January 14, 2019 | Eric | 2019 |
| Iwakiri Castle | 2021 | Miyagi Prefecture | November 1, 2020 | Eric | 2020 |
| Iwakuni Castle | 1999 | Yamaguchi Prefecture | February 1996, August 1998, February 17, 2019 | Eric | 1996
1998
2019 |
| Iwamura Castle | 2007 | Gifu Prefecture | May 2, 2014 | | 2014 |
| Iwatsuki Castle | 2009 | Saitama Prefecture | August 29, 2009 | Eric | 2009 |
| Iyo Matsuyama Castle | 2001 | Ehime Prefecture | October 18, 2001; February 26, 2016 | | 2001
2016 |
| Izaki Castle | 2022 | Kyoto | November 5, 2021 | Eric | 2021 |
| Izu Nagahama Castle | 2016 | Shizuoka Prefecture | February 11, 2016 | | 2016 |
| Izushi Castle | 2004 | Hyogo Prefecture | Sept 26, 2013 | | 2013 |
| Jindaiji Castle | 2012 | Tokyo | July 20, 2015 | | 2015 |
| Jizen Castle (Koka) | 2022 | Shiga Prefecture | February 11, 2022 | Eric | 2022 |
| Jofukuji Castle | 2016 | Tokyo | April 15, 2016 | | 2016 |
| Kaiden Castle | 2014 | Kyoto | October 19, 2014 | | 2014 |
| Kakegawa Castle | 1999 | Shizuoka Prefecture | May 1999; October 15, 2009 | Eric | 1999
2009 |
| Kakunodate Castle | 1999 | Akita Prefecture | April, 1998; Aug 9, 2004; May 11, 2018 | Eric | 1998
2004
2018 |
| Kamaha Castle | 2023 | Shiga Prefecture | November 19, 2022 | Eric | 2022 |
| Kamei Castle | 2012 | Hiroshima Prefecture | November 9, 2018 | Eric | 2018 |
| Kameyama Castle (Kii) | 2023 | Wakayama Prefecture | February 5, 2023 | Eric | 2023 |
| Kaminoyama Castle | 1999 | Yamagata Prefecture | October 1997; November 2, 2017 | Eric | 1997
2017 |
| Kanaiyama Castle | 2017 | Nagano Prefecture | December 2, 2016 | | 2016 |
| Kanao Yogaisan Castle | 2018 | Saitama Prefecture | April 1, 2018 | | 2018 |
| Kanayama Castle | 2007 | Gunma Prefecture | June 23, 2007; May 23, 2013 | Eric | 2007
2013 |
| Kanazawa Castle | 2006 | Ishikawa Prefecture | June 10, 2006; Oct 29, 2016; Oct. 15, 2020 | Eric | 2006
2016
2020 |
| Kanegasaki Castle (Iwate) | 2018 | Iwate Prefecture | May 12, 2018 | | 2018 |
| Kannonji Castle | 2007 | Shiga Prefecture | November 26, 2011 | Eric | 2011 |
| Kano Castle | 2020 | Gifu Prefecture | August 2, 2019 | Eric | 2019 |
| Karakai Castle | 2017 | Tokyo | December 10, 2017 | | 2017 |
| Karasawayama Castle | 2007 | Tochigi Prefecture | June 30, 2007; Feb 25, 2018 | Eric | 2007
2018 |
| Karasuyama Castle | 2015 | Tochigi Prefecture | April 16, 2015 | | 2015 |
| Kasama Castle | 2011 | Ibaraki Prefecture | May 4, 2011 | Eric | 2011 |
| Kasugayama Castle | 2011 | Niigata Prefecture | October 10, 2011 | Eric | 2011 |
| Kasumi Castle | 2016 | Nagano Prefecture | December 2016 | | 2016 |
| Katakura Castle | 2015 | Tokyo | March 28, 2015 | | 2015 |
| Katsunuma Castle | 2015 | Tokyo | May 24, 2015 | | 2015 |
| Katsunumashi Yakata | 2017 | Yamanashi Prefecture | October 9, 2017 | | 2017 |
| Katsuyama Castle (Tsuru) | 2020 | Yamanashi Prefecture | January 14, 2019 | Eric | 2019 |
| Kawagoe Castle | 2006 | Saitama Prefecture | March 25, 2006; Aug 4, 2012 | Eric | 2006
2012 |
| Kawamura Castle | 2014 | Kanagawa Prefecture | April 13, 2014 | | 2014 |
| Kazurayama Castle | 2014 | Shizuoka Prefecture | June 20, 2014 | Eric | 2014 |
| Kazurayama Yakata | 2023 | Shizuoka Prefecture | June 20, 2014 | Eric | 2014 |
| Keirozan Castle | 2023 | Hyogo Prefecture | October 7, 2012 | Eric | 2012 |
| Kimura Castle | 2023 | Shiga Prefecture | December 12, 2021 | Eric | 2021 |
| Kinojo | 2011 | Okayama Prefecture | November 20, 2010 | Eric | 2010 |
| Kirarazaka Castle | 2022 | Kyoto | October 24, 2021 | Eric | 2021 |
| Kirihara Castle | 2016 | Nagano Prefecture | October 30, 2015 | | 2015 |
| Kishiwada Castle | 2006 | Osaka | March 8, 2013 | | 2013 |
| Kitanosho Castle | 2006 | Fukui Prefecture | June 13, 2006 | Eric | 2006 |
| Kiyosu Castle | 1999 | Aichi Prefecture | several times in 1995-1996 | Eric | 1995 |
| Kochi Castle | 2001 | Kochi Prefecture | October 21, 2001 | Eric | 2001 |
| Kofu Castle | 2003 | Yamanashi Prefecture | November 15, 2003; November 17, 2007 | Eric | 2003
2007
2015
2017 |
| Kogane Castle | 2015 | Chiba Prefecture | April 17, 2015 | | 2015 |
| Kokokuji Castle | 2014 | Shizuoka Prefecture | June 20, 2014 | Eric | 2014 |
| Kokururi Castle | 2021 | Chiba Prefecture | May 3, 2021 | Eric | 2021 |
| Komaki Castle | 1999 | Aichi Prefecture | April 1996 | Eric | 1996 |
| Komatsu Castle | 2019 | Ishikawa Prefecture | October 17, 2020 | ART | 2020 |
| Komihanachi Castle | 2023 | Fukui Prefecture | May 1-2, 2023 | Eric | 2023 |
| Komoro Castle | 2008 | Nagano Prefecture | October 16, 2008 | Eric | 2008 |
| Konodai Castle | 2021 | Chiba Prefecture | May 3, 2021 | Eric | 2021 |
| Konosumiyama Castle | 2013 | Hyogo Prefecture | September 26, 2013 | | 2013 |
| Koori Nishiyama Castle | 2021 | Fukushima Prefecture | November 1, 2020 | Eric | 2020 |
| Koriyama Castle (Hiroshima) | 2019 | Hiroshima Prefecture | November 9, 2018 | Eric | 2018 |
| Koromo Castle | 2019 | Aichi Prefecture | January 14, 2020 | ART | 2020 |
| Koshigoe Castle | 2015 | Saitama Prefecture | February 14, 2015 | | 2015 |
| Koyama Castle | 2011 | Shizuoka Prefecture | June 3, 2011 | Eric | 2011 |
| Kozukue Castle | 2010 | Kanagawa Prefecture | April 10, 2010 | Eric | 2010 |
| Kubota Castle | 2011 | Akita Prefecture | May 10, 2018 | | 2018 |
| Kuboyashiki (Koka) | 2022 | Shiga Prefecture | January 29, 2022 | Eric | 2022 |
| Kuboyashikishi Castle (Koka) | 2022 | Shiga Prefecture | January 29, 2022 | Eric | 2022 |
| Kuma Castle | 2017 | Yamanashi Prefecture | March 18, 2017 | | 2017 |
| Kunaishoyu Castle | 2022 | Kyoto | November 23, 2021 | Eric | 2021 |
| Kunohe Castle | 2010 | Iwate Prefecture | May 22, 2010 | Eric | 2010 |
| Kuraji Castle (Koka) | 2022 | Shiga Prefecture | February 25, 2022 | Eric | 2022 |
| Kurobane Castle | 2018 | Tochigi Prefecture | May 9, 2021 | ART | 2021
Viewer Contributed |
| Kurokawashi Castle (Koka) | 2023 | Shiga Prefecture | March 19, 2023 | Eric | 2023 |
| Kururi Castle | 2005 | Chiba Prefecture | May 28, 2005; May 3, 2021 | Eric | 2005
2021 |
| Kutsukake Castle | 2020 | Aichi Prefecture | January 13, 2020 | Eric | 2020 |
| Kuwabara Castle | 2007 | Nagano Prefecture | November 17, 2007 | Eric | 2007 |
| Maebashi Castle | 2016 | Gunma Prefecture | May 3, 2016 | | 2016 |
| Makabe Castle | 2021 | Ibaraki Prefecture | May 5, 2021 | Eric | 2021 |
| Makabe Jinya | 2021 | Ibaraki Prefecture | May 5, 2021 | Eric | 2021 |
| Manago Castle | 2020 | Tochigi Prefecture | March 17, 2019 | Eric | 2019 |
| Mariko Castle | 2011 | Shizuoka Prefecture | June 3, 2011 | Eric | 2011 |
| Marugame Castle | 2005 | Kagawa Prefecture | February 28, 2016 | | 2016 |
| Marune Fort | 2020 | Aichi Prefecture | January 13, 2020 | Eric | 2020 |
| Maruoka Castle | 2006 | Fukui Prefecture | June 13, 2006 | Eric | 2006 |
| Maruoka Castle (Koka) | 2022 | Shiga Prefecture | April 1, 2022 | Eric | 2022 |
| Masugatayama Castle | 2017 | Tokyo | December 10, 2017 | | 2017 |
| Masuo Castle | 2016 | Chiba Prefecture | November 29, 2015 | | 2015 |
| Matsudaira Castle | 2020 | Aichi Prefecture | January 14, 2020 | Eric | 2020 |
| Matsudaira Yakata | 2020 | Aichi Prefecture | January 14, 2020 | Eric | 2020 |
| Matsue Castle | 2004 | Shimane Prefecture | November 19, 2010 | Eric | 2010 |
| Matsugasaki Castle (Yamashiro) | 2022 | Kyoto | October 23, 2021 | Eric | 2021 |
| Matsuida Castle | 2018 | Gunma Prefecture | March 11, 2018 | Eric | 2018 |
| Matsumoto Castle | 1999 | Nagano Prefecture | August 1992; May 13, 2002; April 11, 2009; Oct 30, 2015 | Eric | 1992
2002
2009
2015 |
| Matsuo Castle | 2016 | Nagano Prefecture | December 14, 2015 | | 2015 |
| Matsusaka Castle | 2010 | Mie Prefecture | November 25, 2011 | Eric | 2011 |
| Matsushiro Castle | 2008 | Nagano Prefecture | October 16, 2008; December 3, 2016 | Eric | 2008
2016 |
| Matsuyama Castle (Gunma) | 2017 | Gunma Prefecture | November 24, 2017 | | 2017 |
| Matsuyama Castle (Saitama) | 2011 | Saitama Prefecture | November 11, 2010 | Eric | 2010 |
| Mihara Castle | 2007 | Hiroshima Prefecture | November 8, 2018 | Eric | 2018 |
| Miharu Castle | 2016 | Fukushima Prefecture | December 13, 2020 | ART | 2020 |
| Mikumo Castle (Koka) | 2022 | Shiga Prefecture | April 1, 2022 | Eric | 2022 |
| Minagawa Castle | 2015 | Tochigi Prefecture | April 4, 2015 | | 2015 |
| Minakuchi Castle | 2006 | Shiga Prefecture | September 18, 2022 | Eric | 2022 |
| Minamoto no Tsunemoto Yakata | 2020 | Saitama Prefecture | January 19, 2020 | Eric | 2020 |
| Minato Castle | 2018 | Akita Prefecture | May 10, 2018 | Eric | 2018 |
| Minowa Castle | 2008 | Gunma Prefecture | November 6, 2008; April 8, 2022 | Eric | 2008
2022 |
| Mito Castle | 2008 | Ibaraki Prefecture | September 6, 2008; July 14, 2021 | Eric | 2008
2021 |
| Miyao Castle | 2019 | Hiroshima Prefecture | February 17, 2019 | Furinkazan | 2019 |
| Mochizuki Castle (Koka) | 2022 | Shiga Prefecture | February 11, 2022 | Eric | 2022 |
| Mochizukishi Castle (Koka) | 2022 | Shiga Prefecture | February 11, 2022 | Eric | 2022 |
| Mogusa Castle | 2020 | Tokyo | Dec. 27, 2019 | Eric | 2019 |
| Morioka Castle | 2002 | Iwate Prefecture | October 14, 2002; May 11, 2018 | Eric | 2002
2018 |
| Moriya Castle | 2017 | Ibaraki Prefecture | September 3, 2017 | | 2017 |
| Moroto Castle | 2013 | Chiba Prefecture | May 6, 2013 | | 2013 |
| Motosakura Castle | 2013 | Chiba Prefecture | Dec. 23, 2012 | | 2012 |
| Motosu Castle | 2019 | Yamanashi Prefecture | November 23, 2018 | Eric | 2018 |
| Mukaihaguroyama Castle | 2019 | Fukushima Prefecture | November 3, 2018 | Eric | 2018 |
| Mumo Castle | 2015 | Tochigi Prefecture | April 16, 2015 | | 2015 |
| Murakami Castle | 2011 | Niigata Prefecture | October 9, 2011 | Eric | 2011 |
| Murasame Castle (Koka) | 2022 | Shiga Prefecture | February 11, 2022 | Eric | 2022 |
| Naegi Castle | 2013 | Gifu Prefecture | May 2, 2014 | | 2014 |
| Nagahama Castle | 1999 | Shiga Prefecture | April 1996; March 20, 2012 | Eric | 1996
2012 |
| Nagakubo Castle | 2014 | Shizuoka Prefecture | June 20, 2014 | Eric | 2014 |
| Nagashino Castle | 2009 | Aichi Prefecture | October 16, 2009 | Eric | 2009 |
| Nagata Jin'ya | 2023 | Saitama Prefecture | June 4, 2023 | Eric | 2023 |
| Nagoya Castle | 1999 | Aichi Prefecture | July 1992; several times in 1995-1996; February 23, 2004; August 8, 2018; August 3, 2019 | Eric | 1992
1996
2004
2018
2019 |
| Nagurumi Castle | 2013 | Gunma Prefecture | Apr 29, 2013; Jun 13, 2021 | Eric | 2013
2021 |
| Naka Castle | 2015 | Saitama Prefecture | Feb 14, 2015 | | 2015 |
| Nakaara Castle | 2023 | Shimane Prefecture | Nov 22, 2014 | Eric | 2014 |
| Nakajima Fort | 2020 | Aichi Prefecture | January 13, 2020 | Eric | 2020 |
| Nakao Castle (Yamashiro) | 2022 | Kyoto | Dec 19, 2022 | Eric | 2022 |
| Namioka Castle | 2021 | Aomori Prefecture | November 11, 2020 | Eric | 2020 |
| Nanao Castle | 2006 | Ishikawa Prefecture | June 12, 2006 | Eric | 2006 |
| Nanbata Castle | 2014 | Saitama Prefecture | Sept 14, 2013 | | 2013 |
| Narisawa Castle | 2017 | Yamagata Prefecture | November 2, 2017 | | 2017 |
| Narumi Castle | 2020 | Aichi Prefecture | January 13, 2020 | Eric | 2020 |
| Nasu Kanda Castle | 2015 | Tochigi Prefecture | April 16, 2015 | | 2015 |
| Ne Castle | 2010 | Aomori Prefecture | May 21, 2010 | Eric | 2010 |
| Negoya Castle | 2020 | Gunma Prefecture | February 11, 2020 | Eric | 2020 |
| Nihonmatsu Castle | 1999 | Fukushima Prefecture | November 1997, September 13, 2003 | Eric | 1997
2003 |
| Niitakayama Castle | 2014 | Hiroshima Prefecture | November 8, 2018 | Eric | 2018 |
| Nijo Castle | 1999 | Kyoto | July 1992; March 23, 2004; July 28, 2017; August 17, 2019; Oct/Nov/Dec 2021 | Eric | 1992
2004
2017
2019
2021 |
| Nijo Castle (Tochigi) | 2020 | Tochigi Prefecture | March 17, 2019 | Eric | 2019 |
| Nirayama Castle | 2012 | Shizuoka Prefecture | Nov. 10, 2012 | | 2012 |
| Nirayama Daikansho | 2021 | Shizuoka Prefecture | Nov. 10, 2012 | ART | Viewer Contributed
2012 |
| Nishikata Castle | 2019 | Tochigi Prefecture | March 17, 2019 | Eric | 2019 |
| Nishio Castle | 2009 | Aichi Prefecture | October 15, 2009 | Eric | 2009 |
| Nozaki Castle | 2023 | Osaka | February 26, 2023 | Eric | 2023 |
| Numata Castle | 2013 | Gunma Prefecture | Apr 29, 2013 | | 2013 |
| Nyoigatake Castle | 2022 | Kyoto | June 3, 2022 | Eric | 2022 |
| Oba Castle | 2018 | Kanagawa Prefecture | December 22, 2017 | | 2017 |
| Obata Castle | 2016 | Ibaraki Prefecture | May 5, 2016 | | 2016 |
| Obata Jin'ya | 2016 | Gunma Prefecture | October 18, 2015 | | 2015 |
| Obiki Castle | 2016 | Nagano Prefecture | March 31, 2016 | | 2016 |
| Oda Castle | 2016 | Ibaraki Prefecture | May 5, 2016 | | 2016 |
| Odaka Castle | 2013 | Aichi Prefecture | January 13, 2020 | RaymondW | 2020 |
| Odani Castle | 2010 | Shiga Prefecture | March 20, 2012 | | 2012 |
| Odano Castle | 2016 | Tokyo | April 15, 2016 | | 2016 |
| Odawara Castle | 1999 | Kanagawa Prefecture | May 1999; October 12, 2009; April 3, 2010; October 21, 2019; December 5, 2019 | Eric | 1999
2009
2010
2019 |
| Odoi | 2020 | Kyoto | Nov. 27, 2021 | ART | Viewer Contributed
2021 |
| Odori Castle | 2020 | Saitama Prefecture | January 19, 2020 | Eric | 2020 |
| Ogaki Castle | 1999 | Gifu Prefecture | April 1996; Aug 2, 2019 | Eric | 1996
2019 |
| Ogawa Castle | 2013 | Gunma Prefecture | Apr 29, 2013 | | 2013 |
| Ogawa Castle (Koka) | 2023 | Shiga Prefecture | March 12, 2023 | Eric | 2023 |
| Ogawa Nakanojo Castle (Koka) | 2023 | Shiga Prefecture | March 12, 2023 | Eric | 2023 |
| Ogawa Nishinojo Castle (Koka) | 2023 | Shiga Prefecture | March 12, 2023 | Eric | 2023 |
| Ogimachi Castle | 2016 | Gifu Prefecture | October 21, 2016 | | 2016 |
| Ogoe Castle | 2016 | Fukushima Prefecture | December 13, 2020 | ART | 2020 |
| Ogura Castle | 2011 | Saitama Prefecture | November 11, 2010 | Eric | 2010 |
| Ogyu Castle | 2020 | Aichi Prefecture | January 14, 2020 | Eric | 2020 |
| Ohdate | 2021 | Akita Prefecture | November 12, 2020 | Eric | 2020 |
| Ohkawarashi Castle (Koka) | 2023 | Shiga Prefecture | March 19, 2023 | Eric | 2023 |
| Ohtawara Castle | 2018 | Tochigi Prefecture | May 9, 2021 | ART | Viewer Contributed
2021 |
| Ohtsu Castle | 2021 | Shiga Prefecture | December 28, 2022 | ART | Viewer Contributed
2022 |
| Ohyama Dejiro | 2023 | Kyoto | December 19, 2022 | Eric | 2022 |
| Ojima Jin'ya | 2016 | Shizuoka Prefecture | February 11, 2016 | Eric | 2016 |
| Okami Castle | 2017 | Ibaraki Prefecture | May 3, 2017 | | 2017 |
| Okayama Castle | 2006 | Okayama Prefecture | November 14, 2009 | Eric | 2009 |
| Okazaki Castle | 1999 | Aichi Prefecture | March 1996; August 4, 2019 | Eric | 1996
2019 |
| Oki Castle (Koka) | 2022 | Shiga Prefecture | February 25, 2022 | Eric | 2022 |
| Okishi Castle III (Koka) | 2022 | Shiga Prefecture | February 25, 2022 | Eric | 2022 |
| Okiyama Fort | 2020 | Tokyo | May 4, 2019 | Eric | 2019 |
| Okkoshi Castle | 2016 | Nagano Prefecture | March 31, 2016 | | 2016 |
| Okusawa Castle | 2018 | Tokyo | December 8, 2017 | | 2017 |
| Omi Hachiman Castle | 2004 | Shiga Prefecture | February 21, 2004 | Eric | 2004 |
| Onabuchi Castle | 2016 | Gunma Prefecture | May 3, 2016 | | 2016 |
| Oogo Castle | 2016 | Gunma Prefecture | May 3, 2016 | | 2016 |
| Ori Castle | 2014 | Gifu Prefecture | May 3, 2014 | | 2014 |
| Osaka Castle | 1999 | Osaka | December 1997; March 18, 2012; March 8, 2013; July 28, 2017; December 23, 2018 | Eric | 1997
2012
2013
2017
2018 |
| Osaka Castle (Ibaraki) | 2017 | Ibaraki Prefecture | May 3, 2017 | | 2017 |
| Oshi Castle | 2001 | Saitama Prefecture | August 29, 2001 | Eric | 2001 |
| Otaki Castle | 2009 | Chiba Prefecture | June 20, 2009 | Eric | 2009 |
| Ozu Castle | 2006 | Ehime Prefecture | Feb. 27, 2016 | | 2016 |
| Sakamoto Castle | 2012 | Shiga Prefecture | November 20, 2021 | RaymondW | Viewer Contributed
2021 |
| Sakasai Castle | 2008 | Ibaraki Prefecture | September 23, 2008 | Eric | 2008 |
| Sakata Castle | 2013 | Chiba Prefecture | May 6, 2013 | | 2013 |
| Sakura Castle | 2008 | Chiba Prefecture | March 22, 2008 | Eric | 2008 |
| Sakura Castle (Aichi) | 2020 | Aichi Prefecture | January 14, 2020 | Eric | 2020 |
| Sanada Palace | 2016 | Nagano Prefecture | December 14, 2015 | Eric | 2015 |
| Sanadahonjo Castle | 2016 | Nagano Prefecture | December 14, 2015 | | 2015 |
| Sano Castle | 2007 | Tochigi Prefecture | June 30, 2007; November 25, 2017 | Eric | 2007
2017 |
| Sasao Castle | 2016 | Yamanashi Prefecture | September 22, 2015 | | 2015 |
| Sasayama Castle | 2004 | Hyogo Prefecture | December 20, 2018 | Eric | 2018 |
| Sasayama Shuzan Daikansho | 2022 | Kyoto | November 3, 2021 | Eric | 2021 |
| Sasou Castle | 2020 | Shiga Prefecture | March 1, 2019 | Eric | 2019 |
| Sawayama Castle | 2020 | Shiga Prefecture | March , 2019 | Eric | 2019 |
| Seiryuin | 2016 | Gunma Prefecture | April 29, 2016 | | 2016 |
| Sekiyado Castle | 2003 | Chiba Prefecture | April 29, 2003 | Eric | 2003 |
| Sendai Castle | 2003 | Miyagi Prefecture | September 12, 2003; May 22, 2010 | Eric | 2003
2010 |
| Senpuku Castle | 2014 | Shizuoka Prefecture | June 20, 2014 | Eric | 2014 |
| Setagaya Castle | 2014 | Tokyo | Sept 7, 2013 | | 2013 |
| Shakujii Castle | 2015 | Tokyo | November 3, 2015 | | 2015 |
| Shibata Castle | 2011 | Niigata Prefecture | October 9, 2011 | Eric | 2011 |
| Shibukawa Yorii Castle | 2021 | Gunma Prefecture | June 13, 2021 | ART | Viewer Contributed
2021 |
| Shibuya Castle | 2022 | Tokyo | Dec 27, 2021 | Eric | 2021 |
| Shigiyama Castle | 2012 | Fukushima Prefecture | April 30, 2012 | | 2012 |
| Shimizu Castle | 2017 | Tochigi Prefecture | November 25, 2017 | | 2017 |
| Shimoyama Castle (Koka) | 2022 | Shiga Prefecture | April 1, 2022 | Eric | 2022 |
| Shimoyama Kita Castle (Koka) | 2022 | Shiga Prefecture | April 1 , 2022 | Eric | 2022 |
| Shimura Castle | 2020 | Tokyo | May 4, 2019 | Eric | 2019 |
| Shinagawa Battery Islands | 2011 | Tokyo | March 5, 2011 | Eric | 2011 |
| Shingu Castle (Koka) | 2022 | Shiga Prefecture | February 11, 2022 | Eric | 2022 |
| Shingushi Castle (Koka) | 2022 | Shiga Prefecture | February 11, 2022 | Eric | 2022 |
| Shinpu Castle | 2003 | Yamanashi Prefecture | November 15, 2003; October 9, 2017 | Eric | 2003
2017 |
| Shirahata Castle | 2021 | Tochigi Prefecture | May 9, 2021 | Eric | 2021 |
| Shirakawa Castle | 1999 | Fukushima Prefecture | September 1998, September 13, 2003 | Eric | 1998
2003 |
| Shiroi Castle | 2022 | Gunma Prefecture | June 13, 2021 | Eric | 2021 |
| Shiroishi Castle | 1999 | Miyagi Prefecture | October 1997; May 12, 2018 | Eric | 1997
2018 |
| Shirokane Yakata | 2017 | Tokyo | December 8, 2017 | Eric | 2017 |
| Shishiku Castle | 2016 | Yamanashi Prefecture | October 12, 2015 | | 2015 |
| Shiwa Castle | 2010 | Iwate Prefecture | May 22, 2010 | Eric | 2010 |
| Shobata Castle | 2023 | Aichi Prefecture | Feb 12, 2023 | Eric | 2023 |
| Shogunyama Castle | 2022 | Kyoto | January 10, 2022 | Eric | 2022 |
| Shoryuji Castle | 2008 | Kyoto | December 25, 2016 | | 2016 |
| Shuuchi Castle | 2023 | Kyoto | December 12, 2022 | Eric | 2022 |
| Shuzan Castle | 2022 | Kyoto | November 3, 2021 | Eric | 2021 |
| Sugaya Yakata | 2011 | Saitama Prefecture | November 11, 2010; Feb 14, 2015 | Eric | 2010
2015 |
| Sugiyama Castle | 2011 | Saitama Prefecture | November 11, 2010 | Eric | 2010 |
| Sunpu Castle | 2004 | Shizuoka Prefecture | February 23, 2004 | Eric | 2004
2011 |
| Suwahara Castle | 2010 | Shizuoka Prefecture | October 11, 2010 | Eric | 2010 |
| Taga Castle | 2010 | Miyagi Prefecture | May 22, 2010 | Eric | 2010 |
| Tagayashi Yakata | 2021 | Akita Prefecture | November 12, 2020 | Eric | 2020 |
| Tage Castle | 2018 | Tochigi Prefecture | April 30, 2018 | | 2018 |
| Takada Castle (Niigata) | 2011 | Niigata Prefecture | October 10, 2011 | Eric | 2011 |
| Takahata Castle | 2020 | Tokyo | Dec. 27, 2019 | Eric | 2019 |
| Takai Castle | 2017 | Ibaraki Prefecture | May 3, 2017 | | 2017 |
| Takamatsu Castle | 2006 | Kagawa Prefecture | Feb 28, 2016 | Eric | 2016 |
| Takane Castle | 2009 | Shizuoka Prefecture | October 16, 2009 | Eric | 2009 |
| Takao Castle (Koka) | 2023 | Shiga Prefecture | March 19, 2023 | Eric | 2023 |
| Takasaka Yakata | 2020 | Saitama Prefecture | January 19, 2020 | Eric | 2020 |
| Takasaki Castle | 2008 | Gunma Prefecture | November 6, 2008; November 24, 2017 | Eric | 2008
2017 |
| Takashima Castle | 2007 | Nagano Prefecture | Nov 17, 2007 | Eric | 2007 |
| Takatenjin Castle | 2010 | Shizuoka Prefecture | Oct. 11, 2010 | Eric | 2010 |
| Takato Castle | 2009 | Nagano Prefecture | August 1992, April 11, 2009 | Eric | 2009
1992 |
| Takatome Castle | 2017 | Gunma Prefecture | November 24, 2017 | | 2017 |
| Takatori Castle | 2011 | Nara Prefecture | November 21, 2010; March 2, 2019 | Eric | 2010
2019 |
| Takatsuki Castle | 2013 | Osaka | October 19, 2014 | | 2014 |
| Takatsuki Castle (Tokyo) | 2018 | Tokyo | March 18, 2018 | | 2018 |
| Takayama Castle (Hiroshima) | 2019 | Hiroshima Prefecture | November 8, 2018 | Eric | 2018 |
| Takayama Jin'ya | 2014 | Gifu Prefecture | Nov 8, 2013 | | 2013 |
| Takayashikidate | 2021 | Aomori Prefecture | November 11, 2020 | Eric | 2020 |
| Takeda Castle | 2005 | Hyogo Prefecture | Nov. 15, 2009; Sept 27, 2013 | Eric | 2009
2013 |
| Takeda Yakata (Ibaraki) | 2023 | Ibaraki Prefecture | September 30, 2022 | Eric | 2022 |
| Takenaka Castle (Koka) | 2022 | Shiga Prefecture | February 25, 2022 | Eric | 2022 |
| Taki Castle | 2013 | Saitama Prefecture | September 14, 2013 | | 2013 |
| Takinogawa Castle | 2022 | Tokyo | Dec 27, 2021 | Eric | 2021 |
| Takiyama Castle | 2009 | Tokyo | May 19, 2009; March 22, 2019 (excl. volunteer days) | Eric | 2009
2016
2018
2017
2019 |
| Tamaru Castle | 2011 | Mie Prefecture | November 25, 2011 | RaymondW | 2011 |
| Tanaka Castle | 2010 | Shizuoka Prefecture | October 11, 2010 | Eric | 2010 |
| Tanba Kameyama Castle | 2010 | Kyoto | December 28, 2016; October 5, 2022 | Eric | 2016
2022 |
| Tange Fort | 2020 | Aichi Prefecture | January 13, 2020 | Eric | 2020 |
| Tatebayashi Castle | 2007 | Gunma Prefecture | June 30, 2007; Sept. 16, 2018 | Eric | 2007
2018 |
| Tateyama Castle | 2005 | Chiba Prefecture | 2005-05-28 | Eric | 2005 |
| Tateyama Castle (Yamagata) | 2017 | Yamagata Prefecture | November 3, 2017 | | 2017 |
| Tatsuno Castle | 2004 | Hyogo Prefecture | October 7, 2012 | Eric | 2012 |
| Tatsuoka Castle | 2011 | Nagano Prefecture | September 21, 2011 | Eric | 2011 |
| Tedori Castle | 2023 | Wakayama Prefecture | February 5, 2023 | Eric | 2023 |
| Tenjinyama Castle (Hiroshima) | 2019 | Hiroshima Prefecture | November 7, 2018 | Eric | 2018 |
| Tenpaku Castle | 2016 | Nagano Prefecture | December 14, 2015 | | 2015 |
| Terao Chausuyama Castle | 2020 | Gunma Prefecture | February 11, 2020 | Eric | 2020 |
| Terao Naka Castle | 2020 | Gunma Prefecture | February 11, 2020 | Eric | 2020 |
| Teusuyama Fort | 2020 | Gunma Prefecture | March 22, 2020 | Eric | 2020 |
| To-no-oka | 2020 | Hiroshima Prefecture | February 18, 2019 | Eric | 2019 |
| Tobayama Castle | 2012 | Shizuoka Prefecture | January 12, 2020 | Eric | 2020 |
| Tobiyama Castle | 2008 | Tochigi Prefecture | October 17, 2008 | Eric | 2008 |
| Toishi Castle | 2016 | Nagano Prefecture | March 31, 2016 | | 2016 |
| Tokoji Castle | 2021 | Miyagi Prefecture | November 1, 2020 | Eric | 2020 |
| Tokura Castle | 2017 | Tokyo | March 4, 2017 | | 2017 |
| Tonomi-no-saku | 2018 | Iwate Prefecture | May 12, 2018 | | 2018 |
| Tonoyama Castle (Koka) | 2022 | Shiga Prefecture | January 29, 2022 | Eric | 2022 |
| Torinji Castle | 2017 | Ibaraki Prefecture | May 3, 2017 | | 2017 |
| Toujou Fort | 2021 | Niigata Prefecture | October 10, 2011 | ART | Viewer Contributed
2011 |
| Toyooka Castle | 2013 | Hyogo Prefecture | Sept 25, 2013 | Eric | 2013 |
| Toyooka Jinya | 2013 | Hyogo Prefecture | Sept 25, 2013 | | 2013 |
| Tsu Castle | 2007 | Mie Prefecture | November 25, 2011 | Eric | 2011 |
| Tsuchiura Castle | 2003 | Ibaraki Prefecture | April 29, 2003; May 5, 2016 | Eric | 2003
2016 |
| Tsuchiyama Castle (Koka) | 2023 | Shiga Prefecture | March 19, 2023 | Eric | 2023 |
| Tsukui Castle | 2013 | Kanagawa Prefecture | Nov. 30, 2013 | | 2013 |
| Tsumagi Castle | 2014 | Gifu Prefecture | May 2, 2014 | | 2014 |
| Tsutsujigasaki Palace | 2003 | Yamanashi Prefecture | November 15, 2003 | Eric | 2003
2015
2017 |
| Tsuwano Castle | 2007 | Shimane Prefecture | Nov 22, 2014 | Eric | 2014 |
| Tsuyama Castle (Koka) | 2022 | Shiga Prefecture | April 1, 2022 | Eric | 2022 |
| Uchikoshi Castle (Koka) | 2022 | Shiga Prefecture | February 25, 2022 | Eric | 2022 |
| Uda Matsuyama Castle | 2017 | Nara Prefecture | December 24, 2016 | | 2016 |
| Ue Castle (Koka) | 2022 | Shiga Prefecture | April 1, 2022 | Eric | 2022 |
| Ueda Castle | 2008 | Nagano Prefecture | October 16, 2008; April 4, 2009 | Eric | 2008
2009
2016 |
| Uehara Castle | 2007 | Nagano Prefecture | November 17, 2007 | Eric | 2007 |
| Ueno Castle (Koka) | 2022 | Shiga Prefecture | January 29, 2022 | Eric | 2022 |
| Usayama Castle | 2023 | Shiga Prefecture | Dec 28, 2012 | Eric | 2022 |
| Ushigome Castle | 2020 | Tokyo | December 9, 2018 | Eric | 2018 |
| Ushiku Castle | 2017 | Ibaraki Prefecture | May 3, 2017 | | 2017 |
| Ushiku Jinya | 2017 | Ibaraki Prefecture | May 3, 2017 | | 2017 |
| Usui Castle | 2013 | Chiba Prefecture | May 6, 2013 | | 2013 |
| Usuida Shukuuchi Fort | 2013 | Chiba Prefecture | May 6, 2013 | | 2013 |
| Utsunomiya Castle | 2008 | Tochigi Prefecture | October 17, 2008 | Eric | 2008 |
| Uwajima Castle | 2005 | Ehime Prefecture | Feb 27, 2016 | | 2016 |
| Wada Castle (Koka) | 2022 | Shiga Prefecture | January 29, 2022 | Eric | 2022 |
| Wadashi Castle I (Koka) | 2022 | Shiga Prefecture | January 29, 2022 | Eric | 2022 |
| Wadashi Castle II (Koka) | 2022 | Shiga Prefecture | January 29, 2022 | Eric | 2022 |
| Wadashi Castle III (Koka) | 2022 | Shiga Prefecture | January 29, 2022 | Eric | 2022 |
| Wakayama Castle | 2005 | Wakayama Prefecture | March 17, 2012 | Eric | 2012 |
| Wakimoto Castle | 2021 | Akita Prefecture | November 13, 2020 | Eric | 2020 |
| Washi Castle | 2018 | Tochigi Prefecture | April 30, 2018 | | 2018 |
| Washio Castle | 2017 | Nagano Prefecture | December 3, 2016 | | 2016 |
| Washizu Fort | 2020 | Aichi Prefecture | January 13, 2020 | Eric | 2020 |
| Yagi Castle | 2013 | Hyogo Prefecture | Sept 25, 2013 | | 2013 |
| Yagi Castle (Tanba) | 2022 | Kyoto | May 8, 2022 | Eric | 2022 |
| Yamabe Castle | 2016 | Nagano Prefecture | October 30, 2015 | | 2015 |
| Yamabe Yakata | 2020 | Nagano Prefecture | October 30, 2015 | ART | 2015 |
| Yamada Castle | 2020 | Saitama Prefecture | January 19, 2020 | Eric | 2020 |
| Yamagami Castle | 2016 | Gunma Prefecture | May 3, 2016 | | 2016 |
| Yamagata Castle | 2003 | Yamagata Prefecture | September 12, 2003; November 2, 2017 | Eric | 2003
2017 |
| Yamana Castle | 2020 | Gunma Prefecture | February 11, 2020 | Eric | 2020 |
| Yamanaka Castle | 2002 | Shizuoka Prefecture | July 27, 2002; Nov 10, 2012 | Eric | 2002
2012 |
| Yamanaka Yashiki (Koka) | 2022 | Shiga Prefecture | April 1, 2022 | Eric | 2022 |
| Yamashina Honganji | 2022 | Kyoto | May 3, 2022 | Eric | 2022 |
| Yamato Koriyama Castle | 2009 | Nara Prefecture | Dec 24, 2016 | RaymondW | 2016 |
| Yamazaki Castle | 2017 | Kyoto | October 31, 2022 | ART | Viewer Contributed
2022 |
| Yamazaki Castle (Saitama) | 2020 | Saitama Prefecture | January 19, 2020 | Eric | 2020 |
| Yamura Castle | 2020 | Yamanashi Prefecture | January 14, 2019 | Eric | 2019 |
| Yamura Jin'ya | 2020 | Yamanashi Prefecture | January 14, 2019 | Eric | 2019 |
| Yato Castle | 2016 | Yamanashi Prefecture | September 22, 2015 | | 2015 |
| Yodo Castle | 2010 | Kyoto | October 19, 2014 | | 2014 |
| Yogaisan Castle | 2012 | Yamanashi Prefecture | March 18, 2017 | Eric | 2017 |
| Yokosuka Castle | 2009 | Shizuoka Prefecture | October 15, 2009 | Eric | 2009 |
| Yokote Castle | 2012 | Akita Prefecture | May 10, 2018 | | 2018 |
| Yonago Castle | 2011 | Tottori Prefecture | November 19, 2010 | Eric | 2010 |
| Yonezawa Castle | 2011 | Yamagata Prefecture | November 3, 2017 | | 2017 |
| Yoshida Castle | 2007 | Aichi Prefecture | October 16, 2009 | Eric | 2009 |
| Yoshimizu Jinya | 2017 | Tochigi Prefecture | November 25, 2017 | | 2017 |
| Yuhigaoka Castle | 2023 | Shiga Prefecture | May 3, 2022 | Eric | 2022 |
| Yumurayama Castle | 2017 | Yamanashi Prefecture | October 9, 2017 | | 2017 |
| Yuzuki Castle | 2012 | Ehime Prefecture | February 26, 2016 | | 2016 |
| Zen Castle | 2016 | Gunma Prefecture | May 3, 2016 | | 2016 |
| Zenshoji Fort | 2020 | Aichi Prefecture | January 13, 2020 | Eric | 2020 |
