Matsugo and Isanuma, Kawagoe, Saitama Prefecture
Koedo Onsen KASHIBA
Best if you have three to five hours after sightseeing in Kawagoe and want to combine a natural spring, stone spa, food and somewhere to rest. Less suitable for a quick two-hour soak or visitors who cannot risk a full shuttle bus or event-day traffic.
Check before bathing
- Opening hours
- Bath admission is ¥900 on weekdays and ¥1,000 on weekends and holidays. Stone-spa package: ¥1,000 on weekdays and ¥1,300 on weekends and holidays. Baths are open 10:00–24:00, last admission 23:00; stone spa closes at 23:00.
- Access
- Free shuttles run from Kawagoe and Hon-Kawagoe stations, but full buses may not take additional passengers. During major events such as the Kawagoe Festival or fireworks, service may be delayed or suspended; local buses are a backup.
- Tattoo policy
- Tattoos, tattoo stickers and similar body art are prohibited. No cover-seal exception is confirmed.
Spring & water temperature
- Spring-source temperature
- Not published; 'cool spring' is a classification, not a precise temperature.
- Bathing temperature
- The facility describes a comfortable bathing range of roughly 37–40°C; this is not the underground source temperature.
- Spring source
- Natural Kawagoe spring from about 1,500 metres underground; the current main pages do not name the individual spring.
- Spring classification
- Sodium chloride spring; low-tonicity, weakly alkaline and cool spring.
- pH
- 7.7 on the facility's current homepage.
- Flow rate
- Not published.
- Water handling
- The facility confirms natural spring water in outdoor bathing areas, alongside pot, sleeping, carbonated, jet and silk baths and sauna facilities. A complete pool-by-pool table for water addition, heating, circulation and disinfection is not published; not all pools are described as source-flowing.
- Analysis date
- 2026
Bathing indications
The facility provides general warming information for sodium chloride springs. This is not a treatment guarantee.
Admission and stone-spa prices vary by day. Shuttle seats are not guaranteed, particularly during large events.
How to read a bath profile
Spring-source temperature and actual bathing temperature are kept separate. Each score is shown independently for comparison rather than collapsed into one overall score.
