Gassan-Toda Castle Ruins
月山富田城跡 · Shimane Prefecture · Yasugi City
Around Mount Gassan (Katsuhikiyama) in Hirose, Yasugi City, Shimane Prefecture; a mountain-castle ruin, a national historic site and No. 65 of Japan's 100 famous castles, reached by hiking trails, with no surviving keep.
Know before you go
- Red lines: do not climb or dig stone walls and baileys
- do not remove relics. Taboos: do not make noise or litter on trails
- do not state legendary Amago-restoration results as exact battle figures. Good manners: wear hiking shoes, walk carefully after rain, carry litter down. Common pitfalls: (1) expecting a keep — this is a mountain ruin, so allow hiking time
This article is Not yet verified. Please check official announcements for prices, opening hours and dates.
Stories & people
Stories & people
History
Gassan-Toda Castle Ruins — the historical setting
Gassan-Toda was the Amago clan's main castle, famed for its impregnability and counted among the five great mountain castles of the Sengoku period; both the Ouchi and the Mori failed to take it by direct assault. In 1564–1566 Mori Motonari switched from siege to starvation, and Amago Yoshihisa surrendered and opened the castle in 1566, ending the Amago.
Culture
Culture & customs
Background
Gassan-Toda was the Amago clan's main castle, famed for its impregnability and counted among the five great mountain castles of the Sengoku period; both the Ouchi and the Mori failed to take it by direct assault. In 1564–1566 Mori Motonari switched from siege to starvation, and Amago Yoshihisa surrendered and opened the castle in 1566, ending the Amago.
Local customs
- (1) Gassan-Toda Castle trail (月山富田城登山道) — baileys and stone walls around the Senjojiki area
- (2) View from the main bailey (本丸眺望) — Iinashi River basin and Yasugi plain
- (3) Sugatani and Shiotani gate areas (菅谷口・塩谷口周辺) — geography of the three-sided attack
- (4) Yasugi City History Museum direction (安来市立歴史資料館方面) — Amago and Mori exhibits
- (5) Walk around Hirose old streets (広瀬町散策) — castle-town scenery.
Etiquette & taboos
Etiquette & taboos
Don’t DON'T
- Red lines: do not climb or dig stone walls and baileys
- do not remove relics. Taboos: do not make noise or litter on trails
- do not state legendary Amago-restoration results as exact battle figures. Good manners: wear hiking shoes, walk carefully after rain, carry litter down. Common pitfalls: (1) expecting a keep — this is a mountain ruin, so allow hiking time
- (2) reading "Gassan" (Moon Mountain) as a moon-viewing spot — it is the castle mountain's elegant name, so follow the official trail map.
Locals appreciate DO
Please respect local residents, open areas, and on-site rules.
Plan your visit
Practical info
| Getting there | Intercity: Shinkansen toward Okayama or Hiroshima, then a local JR San'in Main Line-area train to Yasugi Station. Local: bus or taxi to the trailhead, then a hike; buses are infrequent. Pay by IC card or cash; local short-to-medium fares, per official fares. |
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Travel tips
- Check the official notice for admission and opening hours
- museum entry on the order of a few hundred yen, per official prices. Mosquitoes and sun in summer — bring repellent, water and sun protection
- some trails are slippery in winter and after rain — check official information first.
People
People & stories
Sources & verification notes
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