2,999 m — one meter short of the round number, and the limit of the trail
Mt. Tsurugi rises 2,999 m in Kamiichi, Toyama Prefecture, on the northern edge of the Chubu Sangaku National Park. The single meter short of 3,000 m is the figure from the first survey, kept in place through every re-measurement since, and that one missing meter has become part of the mountain's identity. The writer Kyūya Fukada called it the Hall of Rock — a category distinct from the other Northern Alps peaks. Among all the hundred-famous-peaks of Japan, Mt. Tsurugi is the most technically demanding mountain reachable on a regular hiking trail, and fatal falls occur on the route every year.
What sets Tsurugi apart from other Japanese 3,000 m peaks is that the summit ridge is not 'a ridge with some chain sections.' It is a near-vertical rock face climbed on chains and steel pegs hammered into the wall. The two crux passages — Kani-no-Tatebai (the Crab's Vertical) and Kani-no-Yokobai (the Crab's Horizontal) — combine an almost-vertical climb with a sideways traverse along a wall, where missing a foot on a single peg means an immediate fall. Climbers who have done the Yari summit cone or the Jandarume on Mt. Okuhotaka still routinely describe Tsurugi as another level.
Two routes: the Bessan ridge and the Hayatsuki ridge
Two graded hiking routes lead to the summit. The Bessan Ridge route comes in via the Tateyama Kurobe Alpine Route to Murodō, then traverses through Raichō-zawa, Bessan-Norikoshi, and the Tsurugi-sawa hut, with the summit pitch done as an out-and-back from Tsurugi-sawa-goya or Kenzan-sō. It's the longer approach but the elevation gain is spread out, and it is the standard Tsurugi line. The Hayatsuki Ridge route climbs from Baba-shima (760 m) in Kamiichi via Hayatsuki-goya hut to the summit on a single immense ridge — over 2,200 m of vertical, one of the longest sustained ridge climbs in Japan. The technical crux is on the Bessan side, but the Hayatsuki Ridge is the more punishing line physically.
The standard Bessan plan is three days: into Tsurugi-sawa-goya or Kenzan-sō on day one, the summit on day two, descent on day three. The Hayatsuki plan is two days, climbing to Hayatsuki-goya the first day and summiting and descending the second; some climbers combine the two ridges by climbing one and descending the other over three days. Beyond the standard hiking routes, the Yatsumine ridge, Genjirō Ridge, Chinne, and the North Ridge are variation routes for experienced alpinists with rope-work skills.
The Crab's Vertical and the Crab's Horizontal
On the Bessan Ridge, the crux begins after Heizō-no-Kashira. Past Maetsurugi, through Heizō-no-Kashira and Heizō-no-Col, you arrive at the foot of Kani-no-Tatebai (the Crab's Vertical) — roughly 30 m of near-vertical rock equipped with chains and steel pegs. Strict three-point contact, and in crowded conditions a generous gap between you and the climber ahead. Up and down lines on the Tsurugi rock are kept separate — on the descent you instead take Kani-no-Yokobai.
The Yokobai is a horizontal traverse across the face of the wall, and the first step requires putting a foot blind onto an iron peg below the lip of rock you cannot see. Visually it is the most frightening point on the mountain, and climbers freezing here is not at all rare. Accident statistics on Tsurugi show that falls are not limited to the crux — many happen on the descent from Maetsurugi or Ippuku-Tsurugi, on terrain that would feel ordinary in fresh legs. The premise of getting safely off the mountain is keeping your concentration on the way down, when fatigue has accumulated.
1907: the surveyors' first ascent and the swords on the summit
Mt. Tsurugi was one of the last Japanese 3,000 m-class peaks to remain unclimbed in the modern era. Old folklore called it the Needle Mountain or Mountain of Hell, and even the religious mountain-pilgrimage traditions had excluded it. The modern first ascent, in 1907 (Meiji 40), was by an Imperial Army Land Survey team led by Yoshitarō Shibasaki, who climbed via the Bessan Ridge to set up a triangulation point. At the summit, the team found a copper staff head and an iron sword left there by Buddhist ascetics over a thousand years earlier — Nara-period artifacts that immediately rewrote the mountain's history. There had been climbers on Tsurugi well over a millennium before the modern era.
Shibasaki's expedition was novelized by Jirō Nitta as Tsurugidake: Ten no Ki ('Mt. Tsurugi: The Point Record'), filmed by Daisaku Kimura in 2009. The double story — the surveyor and the ancient monk — is now inseparable from any account of Tsurugi. Climbers standing at the summit extend a line that runs back through the 1907 team and beyond them to the unknown ascetics who reached the same rock more than a thousand years before. Climbing Tsurugi is not only a technical exercise — it is a step inside a continuous history of climbing.
A two-month window, snow patches and rockfall
The snow-free season on Tsurugi is short — roughly mid-July to late September. Through early July snowfields remain in Tsurugi-sawa and crampons plus an ice axe are needed. August is the peak month, with huts booked months in advance. Late September brings autumn color and a high fair-weather percentage; by October snow returns and the huts close. Once the huts shut, Tsurugi becomes a winter objective — entirely different gear, entirely different skills, and a major step up in commitment from the summer climb.
Gear is built around continuous time on exposed 3,000 m rock. A helmet is non-negotiable — rockfall from above is a constant risk on the chain sections. Mid-cut or higher boots, and a 40 L pack for two- to three-day food and clothing. Most climbers leave the main pack at Kenzan-sō or Tsurugi-sawa-goya and summit with a daypack, so a packable summit bag is worth bringing. Even in midsummer ridge mornings drop to 5–10 °C (41–50 °F), so a fleece and a windproof, waterproof hardshell are required. Afternoon thunderstorms are common; the standard plan is pre-dawn departure to clear the crux and be descending by noon.
Tsurugi-sawa-goya, Kenzan-sō, Hayatsuki-goya: huts as a safety system
The huts around Tsurugi are both the scaffolding of the trip and a piece of the safety system. Tsurugi-sawa-goya, set deep in the Tsurugi cirque, is the historic hut for climbers and offers the closest view of the mountain. Kenzan-sō, even nearer to the summit trailhead, is the most popular pre-summit overnight. Tsurugi-Gozen-goya at Bessan-Norikoshi sits at the junction with the Tateyama side. Hayatsuki-goya, midway up the Hayatsuki Ridge from Baba-shima, is the indispensable hut for the second route, breaking the immense Hayatsuki climb into a manageable two days.
All four book out months ahead for Obon and the autumn-color peak. For Tsurugi in particular, whether you can reserve a hut bed often determines whether your trip happens at all — the itinerary is usually built backwards from the available bed-nights. A single-day push from any trailhead is not realistic; an overnight at one of the huts is the working minimum.
The standard summit attempt leaves Kenzan-sō by headlamp in the small hours, clears the crux in the early morning, and is back at the hut by midday. In peak weeks the chain sections back up to an hour or more — if a climber freezes at the start of the Yokobai, no one behind moves either. Pre-dawn starts clear the queue and beat the afternoon thunderstorm window. Ask Kenzan-sō to swap your breakfast for a packed bento and aim for a 4 a.m. departure — this is the standard Tsurugi-climber's choice.
Two trailheads: the Alpine Route and Baba-shima
Access for the Bessan Ridge runs through the Tateyama Kurobe Alpine Route to Murodō — about two hours from Tateyama Station on the Toyama side, about four from Shinano-Ōmachi on the Nagano side. From Murodō it's another four to five hours of walking through Raichō-zawa and over Bessan-Norikoshi to Tsurugi-sawa-goya, so even reaching the start of the actual mountain takes most of a day. For the Hayatsuki Ridge, the trailhead is Baba-shima, reached by bus and taxi from Toyama or by private car to the Baba-shima parking. The Hayatsuki side is far enough from the tourist circuit of the Alpine Route that the climb feels qualitatively quieter, even if it is physically harder.
From Tokyo, the Hokuriku Shinkansen reaches Toyama in about two hours, and another half-day takes you onto the mountain. Most parties stay overnight in Toyama or near Tateyama Station to catch the first Alpine Route vehicles, or sleep at a Murodō hotel and reach Tsurugi-sawa the following day. After descent, climbers on the Toyama side wash off at the hot springs near Tateyama Station, while those exiting on the Nagano side head for Ōmachi Onsen-kyō. Climbing Tsurugi starts as a planning question: which face of the mountain — the rock walls seen up from Baba-shima, or the cirque view from above Murodō — do you want to walk toward first?
