01 / Oka Castle
Along the main approach,stones unlike any other castle's line the wall.

The 'kamaboko stones' (かまぼこ石) lining the stone wall along the main approach are a feature seen at no other castle. Oka Castle (岡城跡) is said to have been built in 1185 to welcome Minamoto no Yoshitsune. Its buildings were lost under the 1874 abolition-of-castles decree, and only the stone walls remain today.
- A feature seen at no other castle
- 1185: said to have been built
- 1874: buildings demolished by decree

