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Towada-Hachimantai NP, Akita
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Chinguruma, the valley’s white-flowering carpet, is a tiny deciduous shrub—not a soft-stemmed wildflower. After flowering, silky pinwheel-shaped seed heads appear, inspiring its name, often rendered “child’s pinwheel.”
A local Akita nature group credits “Moomin Valley” to a student patrolling the mountain who thought the volcanic hollow resembled the Moomins’ village. The older map name is Baba-no-koji.
Baba-no-koji’s old name carries a local legend: when fog fills the valley, people say they can hear a god’s horse galloping through, its hoofbeats echoing in the mist.
A tiny pool beside the valley trail is called Katagari Sensui (傾り泉水). A local explanation says its name comes from how its water surface looks slanted when viewed from the summit of Odake.
The valley’s magenta Ezo-tsutsuji blooms near the southern edge of its range: Iwate Prefecture lists Akita-Komagatake among this northern flower’s southern-limit sites. Tiny Hinazakura also forms colonies here.
Moomin Valley lies within Akita-Komagatake’s caldera, among outer-rim peaks and inner volcanic cones. The bowl-shaped landscape is part of the volcano’s story, not simply a valley carved between ordinary mountains.
Neighboring Medake last erupted magma from 18 September 1970 to 26 January 1971, sending out lava and volcanic debris. The four-month eruption is a reminder that this flower-filled valley sits inside an active volcano.
The wider Akita-Komagatake alpine-plant zone—which includes Baba-no-koji and its chinguruma fields—was designated a National Natural Monument on 24 February 1926.
Akita-Komagatake’s summit reaches only 1,637 m, yet its exposed, volcanic summit supports a “pseudo-alpine zone,” rather than a true alpine belt. Those alpine-like conditions help explain the high-mountain flowers around the valley.
The boardwalk is part of the valley’s conservation story: foot-made ruts can collect and channel water, deepen, and dry the surrounding habitat. Staying on the planks helps protect the wet ground and its plants.
