Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Oshu Esashi Onsen Iwate is located in Esashi, part of Oshu City in Iwate Prefecture, in the fertile agricultural landscape of the Kitakami River basin — the broad lowland corridor of northern Tohoku where rice cultivation, horse breeding, and the ancient traditions of the Northern Fujiwara dynasty created one of Japan's most historically significant regional civilisations during the Heian period. The chloride-rich thermal waters draw from the deep sedimentary geology of the Kitakami basin, providing warm mineral baths that reflect the agricultural and community bathing traditions of Tohoku's rural culture, where hot springs have served as social gathering points and physical recovery facilities for farming communities for generations. Oshu City is famous as the birthplace of the Olympic long-distance runner Sato Chuhei, and as the home of the Kitakami riverside sakura avenue — one of Japan's most famous cherry blossom viewing spots — that transforms the city into a pink spectacle each spring.