Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Shishikui Onsen is a sulfurous thermal spring in Tokushima Prefecture on Shikoku's Pacific coast—the wild, surf-battered southern shore of the island where the warm Kuroshio Current washes against dramatic headlands and the name Shishikui (literally wild boar bite) evokes the fierce, untamed character of both the coastline's natural forces and the volcanic thermal waters that emerge from the geological substrate beneath this remote Pacific-facing landscape. The sulfurous waters carry the volcanic potency of hydrogen sulfide mineral compounds in a region where the Pacific Ocean meets the volcanic geology of Shikoku's outer arc, creating a thermal spring experience infused with the wild maritime energy that defines Tokushima's southern coast. The combination of sulfurous volcanic waters and dramatic Pacific coastal setting makes Shishikui one of Tokushima's most atmospherically distinctive and geologically interesting thermal spring discoveries.
Insider tip — Shishikui Onsen occupies a dramatic coastal position in the Muroto-Anan Coast quasi-national park of Tokushima on Shikoku's Pacific shore, where sulfurous water emerges beside rugged sea cliffs. The powerful sulfur content has a detoxifying reputation and the ocean setting adds an iodine-rich sea air element to the bathing experience. The coastline here is famous for surfing, whale-watching, and some of the clearest blue water in the Japanese archipelago. Book a cliffside room for the full effect of Pacific sunrise breaking over the thermal steam at dawn.
