SPADIUM JAPON: When the Bedrock Bath and Lounge Add-On Makes Sense

SPADIUM JAPON is built for lingering. The ordinary admission already includes the natural spring, a broad set of indoor and outdoor baths, and the main sauna areas. The bedrock-bath ticket adds access to a separate lounge with heat rooms, books and places to settle in. It is a poor-value extra for a quick soak, but easier to justify if you expect to spend several hours there.

Price the whole stay before you choose a ticket

Bedrock bathing is not sold without bath admission. Access is limited to junior-high students and older. A rental towel set costs ¥300; shampoo and body wash are available in the bathing area. Some dates may have special pricing, so check the official notice before travelling.

The regular bath ticket is enough for the spring, the artificial carbonated baths, indoor and outdoor pools, and the sauna circuit. The extra ticket is about having somewhere to rest between sessions: the facility’s bedrock area includes several heat rooms, a large manga collection and shared lounge seating. On crowded days, lounge seats can be the limiting factor, so a ticket with no time limit is not a promise of an available recliner.

The spring is clear, not the dark water often associated with Tokyo

The facility’s spring is called Higashikurume Musashino Onsen. Its official description gives a drilling depth of about 1,500 metres, a source temperature of 37–38°C, and a flow rate of around 180 litres per minute. It is a sodium-chloride and bicarbonate spring and is described as colourless and clear. The carbonated baths are made by adding carbon dioxide; they are not separate natural springs.

SPADIUM JAPON lists around 15 types of baths and saunas. The outdoor main pool and several other baths use the local spring, while some individual tubs and cold baths use the area’s groundwater. That mix is why “15 baths” should not be read as 15 natural-spring pools. The current site does not give a full water-treatment breakdown for every pool.

Allow time for the bus or shuttle

The address is 2-7-7 Uenohara, Higashikurume. From Higashikurume Station, the Seibu bus to Higashikurume Danchi takes about seven minutes, followed by a short walk. Free shuttles also connect the facility with Higashikurume, Tanashi, Shiki and Asakadai/Kita-Asaka; check the current timetable before you set out because these are not train-frequency services. There is a large free car park, but arriving by car will not solve a full lounge on a busy afternoon.

The usual schedule is 9 a.m.–1 a.m. on weekdays and 8 a.m.–1 a.m. on weekends and holidays; Friday and the eve of a holiday extend to 2 a.m. It is not a 24-hour or overnight facility, and special hours can change the schedule. Guests with tattoos may enter only if they have a single tattoo that can be fully covered by one of the facility’s designated stickers. Young children must follow the diaper and same-gender bathing rules listed in the facility guidance.

Sources

- [SPADIUM JAPON: current admission, opening hours and visitor rules](https://www.spajapo.com/info/) - [SPADIUM JAPON: natural spring data](https://www.spajapo.com/f/concept) - [SPADIUM JAPON: bath and sauna information](https://www.spajapo.com/spa/) - [SPADIUM JAPON: bedrock bathing rooms and lounge](https://www.spajapo.com/bedrockbath/) - [SPADIUM JAPON: access and shuttle timetable](https://www.spajapo.com/access/) - [SPADIUM JAPON official advance tickets: weekday and holiday bundle prices](https://www.spajapoticket.com/) - Images: open-air spring and bathing-area images from SPADIUM JAPON. Checked: 2026-09-27

Tags: SPADIUM JAPON, Higashikurume onsen, Tokyo day spa, bedrock bath, Tokyo natural spring