3 Level Yagura
三重櫓
Main keeps are basically really big yagura that evolved to 3 or more levels. Especially, in eastern Japan many castles built a large 3 level yagura in place of a main keep. Such main keep were also called gosankai yagura. The main keep of Hirosaki Castle and Marugame Castle are actually 3 level yagura. At Edo Castle, the 3 level Fujimi Yagura was used in place of the main keep after it burned down too.
| Typical 3 level yagura |  Edo Castle |
 Takamatsu Castle |
 Fukuyama Castle |
 Nagoya Castle |
 Hikone Castle |
| Gosankai Yagura | |||
 Hirosaki Castle |
 Kakegawa Castle |
 Shiroishi Castle |
 Shirakawa Castle |