ThermaeExplore the map →

Yashio Onsen Saitama

Yashio, Saitama (Kanto), Japan
Yashio Onsen Saitama
Location
Yashio, Saitama (Kanto), Japan
Water type
sodium chloride
Temperature
41 °C
pH
7.3

Water profile

Thermicity
Sedative
41 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Restorative
LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy
Effortless float
LowHigh

Dense, salty water — you float without effort.

SodiumChloruresBrome

Yashio, in the southeastern Saitama Prefecture adjacent to the Tokyo metropolitan boundary and Misato in Saitama, is a compact industrial and residential city whose extensive leek (negi) cultivation in the surrounding farmland has made Yashio negi one of the most celebrated agricultural products of the lower Saitama plain, prized by professional chefs throughout the greater Tokyo food culture. Yashio Onsen Saitama draws on chloride-rich thermal waters from the geological resources of the southeastern Saitama lowlands, offering warm restorative baths in a compact suburban city whose negi cultivation heritage, industrial waterway character along the Showa Irrigation Canal, and easy access to central Tokyo via the Tobu Urban Park Line create a practically located and accessible spa destination. The traditional Yashio negi cultivation, the Showa Irrigation Canal cycling paths, and the easy urban access to both the Saitama Prefecture arts centres and central Tokyo's cultural attractions make Yashio a conveniently connected suburban spa destination on the Tokyo metropolitan boundary.

Insider tip — Yashio is a compact industrial city on the eastern Saitama plain bisected by the Motoarakawa River, close to the Tokyo Outer Ring Road and the sprawling Soka logistics zone. Its sodium-chloride sento taps the same saline Kanto aquifer exploited across eastern Saitama and provides a reliable warming soak for the area's working population. The no-frills local atmosphere and competitive pricing make it a favourite of regulars.
Find hotels nearby →Tickets & activities →See the map & practical info →

Nearby

Frequently asked questions

How hot is the water?
The water runs quite hot here, around 41 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).