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Daisetsuzan NP, Hokkaido
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About 2,000–3,000 years ago, Asahidake’s flank collapsed, carving the horseshoe-shaped crater on its west side; the resulting avalanche reached today’s hot-spring area. Fumaroles still send steam from the crater floor.
Around Asahidake’s high slopes, about 250 alpine plant species have been recorded—roughly 40% of Japan’s alpine flora. Some are Daisetsuzan endemics, making the rocky approach to the summit a botanical treasure trove.
In 1921, writer Ōmachi Keigetsu and companions crossed trackless Daisetsuzan to Asahidake in 4 days. His travel writing helped make the range famous; just 2 years later, a through-trail and stone huts were built.
At Asahidake’s foot, the annual ヌプリコㇿカムイノミ is an Ainu rite asking the mountain spirit to protect hikers. The mountain-opening celebration also features a torch procession and dancing around a bonfire.
The Kamikawa Ainu called Daisetsuzan “ヌタㇷ゚カムイシㇼ” or “ヌタㇷ゚カウㇱペ.” The flower-rich heights were known as “カムイミンタラ”—the garden where kamuy play—and the summit was regarded as especially close to the divine world.
Japan’s mapmakers selected a first-order triangulation point at the summit on September 10, 1900, before GPS existed. Its official point-name is 瓊多窟 (ぬたっく)—not Asahidake.
Even in July, snow left from June can still be melting beside newly blooming alpine plants. On Asahidake, the short growing season lets spring snowmelt and summer flowers occupy the same mountainside.
The high mountain trail crosses easily eroded volcanic deposits, and snowmelt, rain and footsteps can wear them away. Wind-scoured alpine vegetation is fragile too, and can be slow to recover once damaged.
