Most of the Japanese castle's walls are white, but Okayama castle has interestingly black walls.
Sometimes the castle is called as "Black Bird Castle".
Hope you enjoy
(It's been hard days for me for weeks because of my real job, I don't have much time to reply to past comments by my friends T_T...
But I'll sure reply to all the comments in this weekend.)
Okayama castle, Okayama, Japan.