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Daisetsuzan NP, Hokkaido
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After the ninth station, a big rock juts into Kurodake’s trail: Maneki-iwa, or “Beckoning Rock.” Its local name celebrates how it seems to greet climbers nearing the summit after a hard ascent.
Kurodake’s autumn colors travel downhill like a slow wave: they typically start near the summit in early September, then take more than a month to reach Sounkyo’s hot-spring town.
For Upper Kamikawa Ainu, Daisetsuzan—not Kurodake alone—was Kamuy Mintar, “the garden where kamuy play”; the wider range was also called Nutapukaushipe, “one standing above a broad wetland.”
Writer Omachi Keigetsu’s 1921 traverse helped inspire the Kurodake–Asahidake route: by 1923 a trail and stone-built shelters followed. The Kurodake Ishimuro’s original stone base survives beneath later additions.
Kurodake’s gateway gorge was once called Reizan Hekisui. Writer Omachi Keigetsu popularized “Sounkyo” after his 1921 visit, borrowing the name from nearby Ainu Sounbetsu, “river with waterfalls.”
Heavy snow helps make Kurodake’s flower meadows: snowfall and avalanches supply abundant meltwater, while steep slopes drain freely. The brilliant summer blooms are, in part, a product of winter.
A 2016 survey found 35% vegetation cover in a wind-scoured Kurodake plot but 98.2% in a snowbed plot at Kurodake Ishimuro. The exposed and snow-fed sites also supported different plant communities.
Kurodake’s wind-scoured slope supports 3 recorded host plants for Daisetsu-takanehikage, an alpine butterfly designated a Japanese Natural Monument in 1965—a reminder that even sparse ground can be vital habitat.
Kurodake’s summit exposes chocolate-brown andesite with plagioclase crystals up to 1 cm across. Geologists classify it as an old lava dome, whose northwest side ends in an abrupt cliff.
