I have now visited Nijo Castle in Kyoto, it's very famous for the nightingale floors.
The "sing" when you walk on then.
Will spend the night in a Ryokan, a traditional Japanese Hotel.
Btw, Japanese tv wanted to shoot me while a was taking photos in a park surrounding the castle.
I liked the place very much, saw a geisha, and lots of ladies with kimonos.
The last image in this post shows what a subway ticket machine looks like.