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Joshin’etsukogen NP, Gunma
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Legend says a blue glow revealed a princess washing her hem in the Tanigawa River; when she vanished, water sprang from the rock. Locals called it Mimosuso-no-yu, and Fuji Asama Shrine honors Konohanasakuya-hime.
Tanigawa’s Fuji Asama Shrine was part of a summit pilgrimage: its Okumiya stood on Mt. Tanigawa, where a sacred mirror was kept. The middle sanctuary has ridge tablets dated 1658 and 1663.
Scientists sampled 18 Tanigawa springs along just 2.5 km of river and found 2 chemistry groups. The water is meteoric—rain or snowmelt seeping underground—then diluted by shallow groundwater and picking up minerals in green tuff.
Dazai put Tanigawa Onsen into 2 works: 『創生記』 names Kinseikan at Tanigawa Onsen, while 『姥捨』 sends its characters back to the same hot-spring village. The real place-name appears in both stories.
A Tanigawa ryokan serves Minakami rice grown by Yoshimitsu Honda, whose rice won gold at the Taste Analysis Appraisal Contest. His fields use Tone-basin water and the natural slopes of the mountain foothills.
At Fuji Asama Shrine, a rare cedar called muresugi splits into many upward-growing trunks about 2.5 m above the ground, giving it an upside-down silhouette. Minakami estimates it is 150 years old and protects it as a natural monument.
Each April 29, the shrine’s preservation group offers daidai kagura, a sacred Shinto dance, in the spring festival. It is a living community tradition at the same mountain shrine associated with Tanigawa’s hot-spring legend.
Tanigawa Onsen was already recorded in the 17th century as one of 5 hot springs in the Numata domain. That puts its documented history well before the railways that later helped turn Minakami into a major resort area.
Tanigawa residents pay attention to the colors of roofs and walls to keep the mountain scenery in view. The town designates the onsen as a special landscape district, where qualifying building projects also need local representatives’ agreement.
