Yōgaiyama Castle
| Yōgaiyama Castle (要害山城, Yōgaiyama-jō) was a Sengoku period yamajiro located in Kai Province (present day Yamanashi Prefecture), constructed in the 1520s by the Takeda clan. Since 1991, the ruins have been protected as a National Historic Site since 1938.[1] The castle is also known as the Sekisuiyama Castle (積翠山城, Sekisuiyama-jō) | ||||||
| Type： Yamashiro-style Japanese castle | ||||||
| Built： 1520 | ||||||
| Builder： Takeda Nobutora | ||||||
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