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Myōkō-Togakushi Renzan NP, Nagano
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Kurohime may once have reached about 2,500 m; around 40,000 years ago, its summit collapsed into a horseshoe-shaped crater. Today’s 2,053-m high point sits on the rim, just above the 2,046-m inner cone.
At Kurohime’s foot, Tanéike is part of a living rain-prayer rite: worshippers carry its water without speaking or looking back to Togakushi Shrine, then take it home for the fields. The shrine says the practice continues.
One local legend says a lord’s daughter, Kurohime, plunged into a pool high on the mountain to stop a dragon’s flood from destroying the town. The waters subsided; the tragic tale is one traditional explanation for the mountain’s name.
Kurohime’s crater pools are known as Nanatsu-ike, or “Seven Ponds,” but a Ministry of the Environment ranger observed that their actual number appears to be a little higher. The name may be a charming understatement.
At Kurohime’s Tengu-no-Roji, alpine plants survive unusually low, at 1,820 m. A boulder field keeps the soil sparse and temperatures cool—a postglacial “cool spot” where high-mountain species persisted as forest trees spread.
Kurohime’s rocky summit zone shelters hikarigoke, or “glow moss,” but it makes no light of its own. Tiny lens-shaped cells redirect incoming light, creating the moss’s eerie green shine.
Around Nakano, a towering summer cloud over Kurohime is said to herald thunder and rain. It’s a bit of local weather lore that turns the familiar mountain into a cloud-reading landmark for neighboring communities.
Kurohime’s Osabasō blooms around the June opening climb; a 2021 Environment Ministry ranger noted its fernlike leaves and said it seemed unique among nearby mountains. The delicate plant looks like a tiny fern, but is not one.
A small shrine to Benzaiten stands at Kurohime’s summit. At the 2021 opening climb, the local tourism association president offered the year’s hiking-safety prayer there—a mountain tradition still woven into the community’s seasonal start.
Born in nearby Kashiwabara, poet Kobayashi Issa called Kurohime his “hometown mountain,” wondering in a haiku whether haze or snow blurred its outline—a homesick weather report in a few syllables.
