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Daisetsuzan NP, Hokkaido
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Yellow sulfur crystals beside Asahidake’s vents once had a practical use: sulfur mined here in the 1940s supplied gunpowder. Traces of the old work road remain between the 4th viewpoint and the fumaroles.
Each year at Asahidake’s mountain-opening ceremony, Upper Kamikawa Ainu pray to 7 kamuy—not only the mountain deity, but also the water deity and others—for the safety and happiness of climbers and visitors.
Higashikawa’s Asahidake spring water gets an edible encore: a local pastry shop pairs rich caramel custard with a clear, refreshing jelly made from the mountain’s celebrated source water.
Asahidake’s summit is surprisingly young: it formed by about 5,000 years ago. A collapse 3,000–2,000 years ago carved the horseshoe-shaped Hell Valley, and its rock avalanche reached the hot-spring area below.
Even in June, Asahidake can still have cherry blossoms. Chishima-zakura flowers so late here that Japan’s Nature Research site describes it as the country’s latest-blooming cherry.
After its cream-white summer flowers, chinguruma develops feathery, wheel-like seed heads. On rocks it often flowers more: sun-warmed stone, earlier snowmelt and less competition give the plant an advantage.
The Geological Survey of Japan identifies Matsumoto Juro’s 1876 climb as the first reliably recorded ascent of Asahidake’s summit by a Japanese climber—a documented milestone, not a claim about who reached it first.
Poet Omachi Keigetsu’s 1921 traverse to Asahidake had an unusual local guide: gardener Narita Kasuke, who searched cliffs for bonsai-worthy trees. With no built trail, the approach followed footprints and streambeds.
The hot-spring area below Asahidake was once called Yukomanbetsu. Higashikawa’s tourism office explains the Ainu name as “river that goes toward hot water”—a place-name clue to its geothermal springs.
At Asahidake’s ceremony, Ainu dances become little nature portraits: one mimics fir trees swaying in the wind, another cranes. Visitors can join the closing circle dance, accompanied by the mukkuri jaw harp.
