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Our guide
Yōgaiyama Castle, also known as Sekisuiyama Castle, was a Sengoku-period mountain castle in Kai Province, now Yamanashi, built in the 1520s by the Takeda clan. Its ruins are a National Historic Site.
Tsutsujigasaki Castle and Takeda Shrine are each about 2.6 km away. We have not checked the trail, so look for local information before you go.
Written by japan-spots.com (2026-09-22) from the sources credited on this page. Distances are straight lines between map positions.
Photos
Photos from Wikimedia Commons, each under its own licence — see credits
- Mt.Yogai Kofu city — さかおり ( talk · CC BY-SA 3.0 · source · resized
- Stele for Takeda Shingen birthplace at Yogaisan Castle — Yasu ( talk ) · CC BY-SA 3.0 · source · resized
- Site of moat and mound at Yogaisan Castle — Yasu ( talk ) · CC BY-SA 3.0 · source · resized
- Site of kuruwa at Yogaisan Castle — Yasu ( talk ) · CC BY-SA 3.0 · source · resized
- Site of honmaru at Yogaisan Castle — Yasu ( talk ) · CC BY-SA 3.0 · source · resized
- Site of gate at Yogaisan Castle — Yasu ( talk ) · CC BY-SA 3.0 · source · resized
What this place is
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. The castle is also known as the Sekisuiyama Castle (積翠山城, Sekisuiyama-jō).
Background text from Wikipedia (CC BY-SA 4.0)
What to expect at this type of place: Castle
Getting there
We do not have step-by-step transit directions for this spot yet. Open the location on Google Maps for routes from where you are staying.
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