Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Hijiori Onsen in Okura village, Yamagata prefecture, is a compact traditional onsen settlement in a remote mountain basin of the Mogami highlands, where sulfurous geothermal waters fill communal baths in a village of wooden ryokan whose rustic character has been preserved by deliberate resistance to modern development. The legend of Hijiori — that the spring was discovered by the Buddhist monk Kōbō Daishi — connects the thermal waters to the sacred mountain pilgrimages of Japanese Shingon Buddhism that crossed these Dewa highlands for a thousand years. The surrounding Obanazawa basin, famous for safflower (beni-bana) cultivation used in Kyoto kimono dyeing, and the Shōnai Plains rice culture give Hijiori's remote onsen a deep agricultural and religious heritage unique to Yamagata's mountain interior.
Insider tip — Hijiori Onsen is a compact, deeply traditional village at the edge of Gassan's volcanic range in rural Yamagata, fed by sulfurous waters that have been piped communally since the Edo period. A single shared indoor bath, the konyoku Soto-no-yu, remains one of the last mixed-gender public baths in Tohoku. The surrounding paddies and thatched farmhouses create a time-capsule atmosphere that contrasts sharply with Yamagata's urban spa resorts.