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Daisetsuzan NP, Hokkaido
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Daisetsuzan’s seasonal bookends nearly touch: the Chishima cherry blossoms among Japan’s latest, around mid-June, while autumn color starts by late August. This highland can race from spring into fall in a few weeks.
The famous red carpet is often Chinguruma, which looks like ground-hugging grass but is actually a rose-family dwarf shrub, only about 10 cm tall. Its tiny leaves turn scarlet across whole alpine slopes.
Chinguruma stages two seasons at once: its leaves turn red in early September while airy white seed plumes from summer flowers can still sway into late September. One plant shows both the fiery and feathery sides of fall.
Daisetsuzan’s color front takes about a month to travel downhill, from high slopes to Sounkyo in early October. The mountain’s autumn is a moving band, not one brief peak.
At Asahidake, the earliest first-snow observation on record was September 6, 1925. In some years, fresh white on the high peak overlaps with red foliage lower down—autumn and winter in one view.
Kamikawa Ainu revered Daisetsuzan as Kamuy Mintara, “the gods’ playground,” and a sacred place bringing nature’s gifts. The familiar autumn spectacle belongs to a landscape with a much older cultural meaning.
Daisetsuzan’s peaks are mostly around 2,000 m, yet their far-north climate rivals that of Honshu’s 3,000 m mountains. That helps explain why autumn color begins here unusually early.
Hourly camera records from Asahidake and 2 other alpine sites linked later spring leaf-out with brighter autumn reds. Under the study’s strongest-warming scenario, models project Japan’s alpine color brightness falling about 15% by 2081–2100.
