Iga, Mie
Iga Ueno Castle
伊賀上野城
This castle has had three keeps: Tsutsui Sadatsugu's three-tiered one, Todo Takatora's five-tiered keep toppled by a storm just before completion, and a wooden keep built in the Showa era by a local politician with his own money.
Japan's 100 Fine Castles No. 42CastleHilltop