Tsurugi-dake Circuit
✓ Verificada contra la agencia · PrefecturalCircuit from Murodo to Tsurugi-dake (2,999m), 'the most dangerous mountain climbable in Japan.' Chains, ladders, and the Kani-no-Yoko-bai cliff traverse. Mandatory climbing notification in Toyama Prefecture.
Clasificación de seguridad
Safe window: snow-free mid-July to late September in fair weather — Toyama's grading applies to snow-free conditions only, and the Murodo approach (Tateyama Kurobe Alpine Route) operates Apr 15–Nov 30. Not safe: snow gullies persist into July; from December 1 to May 15 the Tsurugi area is a regulated winter zone under the Toyama Prefecture Climbing Notification Ordinance — a climbing notification must be filed 20 days in advance and the issued certificate carried; entry to the special danger zone is formally discouraged Dec 1–Apr 15 and solo climbers are asked to abandon the climb; failure to file is fined up to ¥50,000.
- ▲Fatal falls on the Kani-no-tatebai / Kani-no-yokobai near-vertical chained pitches — graded E by Toyama Prefecture: 'demanding rock-ridge climbing with continuous danger spots of falling and sliding'
- ▲Rockfall in the gullies and on congested chain sections at peak season
- ▲Snow lingering in the gullies into July on the Bessan-one route from Murodo (route grade valid only snow-free)
- ▲Sudden weather deterioration at 2,999 m with sustained exposure and few retreat options past Mae-tsurugi
- ▲Winter (Dec 1–May 15): extreme avalanche and storm conditions — legally regulated, notification mandatory, solo entry asked to be abandoned
Toyama Prefecture's grading rates Tsurugi-dake from Murodo Terminal via the Bessan ridge technical E / physical 5, the Hayatsuki ridge from Babajima E/6, and the Murodo→Babajima traverse E/5–7 — the same top grade as the Daikiretto. Go only mid-July to late September, snow-free, in stable weather, with helmet and via-ferrata-style self-belay for the chains; prior E-grade experience is the prefecture's stated expectation. Do not attempt Dec 1–May 15 without full winter-alpine competence and the mandatory 20-day-advance notification; a guide is strongly advisable for anyone not experienced on Japanese chained E-grade rock.