I'm fascinated by Japanese history and the hundreds of castles are a big part of it. Many castles have been destroyed by fire, war, or disasters and are in ruins, and quite a few have been reconstructed. There are twelve original castles: Himeji, Matsuyama,Matsumoto, Hikone, Matsue, Hirosaki, Bitchu Matsuyama, Inuyama, Kochi, Maruoka, Uwajima, and, Marugame.
Check out these links to see posts about Japanese Castles I've visited. I've listed the name of the castle and the prefecture. In the case of Himeji, Nijo-jo, Shuri-jo, and Takamatsu, I also listed the date of the trip because I visited more than once.