From Jcastle.info

Jcastle.info strives to be the most comprehensive guide to Japanese castles available in English. You can start by viewing castles from the popular categories above. You will also find a wealth of information about Samurai Homes, Edo Castle Stone Quarries, and the various structures found at castles. Be sure to check the Featured Articles for some in-depth explorations into Japanese through the window of castles and castle towns too.