At the start of day 3, we went to Kumamoto Castle :)
It’s a hilltop castle that still has some of its original buildings around it, but the main keep is a concrete reconstruction built in 1960.
There are a few staff members around dressed as soldiers etc from the time period, and it’s a big place to walk around if you go around all of the grounds and various buildings ^^
The inside of the keep is a museum, and because only the outside really resembles the original structure, the inside is very different from other castles, like the one in Kochi.
Good place to look around though ^-^