Mt Poroshiri

Mt Poroshiri (Japanese: 幌尻岳) is the great summit of the Hidaka Mountains, a long, wild range running down the spine of southern Hokkaido. It is the highest peak in the Hidaka chain and one of the most remote major mountains in Japan. Because of its remote location and difficult approach, it's widely known as the toughest of the hyakumeizan*. For many hikers, it represents one of the most challenging and rewarding non‑volcanic climbs in the country.

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The topography is rugged and sweeping. Poroshiri rises from a maze of steep river valleys, climbing into a broad, open alpine world shaped by ancient uplift rather than volcanic activity. The ridges are long and rugged, with rocky outcrops that offer wide views toward the Pacific and the interior of Hokkaido. The summit itself is a spacious, stony crest, open to the sky and the constant Hidaka wind. Because the mountain stands alone at the top of the range, the panorama is immense.

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But Poroshiri’s fame does not just come from its remoteness in one of Japan’s least accessible mountain systems, with few roads and long approaches. Most climbers begin from the Nukabira trailhead, following a long forest road before the real work begins. Before begining the actual climb, hikers must ford a wild river more than 20 times. This route is dangerous after heavy rain, and when I went I had to cross sections where the icy cold water came above my waist. After completing the river section, the route climbs steadily through thick woodland, eventually reaching the open alpine zone where the views expand and the wind becomes a constant companion. The final ridge is a beautiful, exposed walk with broad slopes, scattered rock and a steady rise toward the summit. It's here I encountered my first brown bear, qho fortunately headed into the undergrowth when it sensed my presence. This is typically a full‑day climb, often done with an overnight stay at the Poroshiri Hut, and requires stamina, preparation and respect for rapidly changing weather.

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* 100 famous mountains of Japan

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(All information here is based on personal observations and experiences. Check official sources before planning or starting any hikes.)