Matsumoto Castle
Pretty impressive castle! It had 3 moats at one stage - two sides of the 3rd moat is in the process of being restored.
The castle is one of the oldest original castles in Japan - it hasn't burned down and been rebuilt! Parts date from the 1500s. It did come close to demolition in the 1870s, and was in danger of imminent collapse until a preservation society was established in 1901 and repairs started.