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Kumomi Onsen

Matsuzaki, Shizuoka, Japan
Kumomi Onsen
Location
Matsuzaki, Shizuoka, Japan
Water type
sulfurous
Temperature
44 °C
pH
6.5

Water profile

Thermicity
Sedative
44 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Bio-active
LowHigh

Rich in active gases or metals — a strong mineral character.

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

SoufreSulfuresSulfates

Kumomi Onsen—Cloud Viewing Spring—takes its name from the act of viewing clouds (kumomi) from a position of elevated perspective, a spring situated where the sky's dramatic maritime cloud formations can be observed over the Pacific Ocean and the dramatic headlands of Shizuoka Prefecture's Nishi-Izu coast, one of Japan's most scenic Pacific coastal landscapes where steep volcanic cliffs meet the open sea in a succession of dramatic natural vistas. The West Izu coastal setting gives Kumomi Onsen a maritime atmospheric quality that distinguishes it within Shizuoka's thermal spring tradition—a small village spring accessible primarily by boat from the nearest road terminus, creating a natural seclusion that enhances the cloud-viewing atmospheric quality of this Pacific coastal thermal retreat. This sea-facing spring offers the distinctive combination of volcanic mineral bathing and cloud-ocean viewing characteristic of Japan's most dramatically situated coastal onsen.

Insider tip — Kumomi Onsen is a small coastal onsen village on the wild Izu Peninsula, where sulfurous springs bubble up near the shore and some baths literally face the Pacific Ocean. The combination of salt sea air and volcanic mineral water creates a uniquely invigorating bathing atmosphere rarely found elsewhere. Fishing boats pass in view from the outdoor rotenburo on clear days. The village remains refreshingly uncommercial compared to busier Izu resorts, preserving an authentic showa-era onsen village feel.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 44 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).