The origins of Onibajō are not clear, which is a shame because it has a cool name ("Demon Place"), but it was controlled by a branch of the Suwa Clan called the Amagasaki in the Sengoku Period. In the middle 16th century Onibajō was subjugated by Takeda Shingen.
There is a nature trail leading all the way from Ueharajō to Onibajō, making for a pleasant stroll between the two sites. Onibajō is a small site consisting of trenches, embankments and bailey ruins. One can enter from either the main road up a long stairway, or from the top of a residential area called Jōyama. Dorui (embankments) surround the shukuruwa (main bailey), and reach across the mountain ridge where one might otherwise expect to see more trenches. A large trench splits the castle roughly in two. The ninokuruwa (second bailey) is now the site of a pylon. Obi-kuruwa (ring baileys) wrap around the first and second enclosures. A third bailey sits between ramparts of piled earth, and has terraced sub-baileys below on either side.
|English Name||Oniba Castle|
|Year Founded||Sengoku Period|
|Castle Condition||Ruins only|
|Historical Period||Pre Edo Period|
|Artifacts||Karabori, Dorui, Baileys|
|Access||Chino Station on the Chuo East Line; walk 35 minutes|
|Visitor Information||24/7 free|
|Time Required||45 minutes|
|Location||Chino, Nagano Prefecture|
|Coordinates||36° 0' 17.32" N, 138° 10' 23.63" E|
|Year Visited||Viewer Contributed|
|Added to Jcastle|