Toshimaen, Nerima, Tokyo

Toshimaen Niwa-no-Yu

Best for adults who want a longer spa visit combining shared swimwear bathing and outdoor sauna with separate nude-bathing areas. Guests with tattoos and children under 13 are not admitted; there is no facility parking.

Check before bathing

Opening hours: 10:00–23:00; last admission 22:00. Adult admission from 2026-04-01 is ¥2,600 on weekdays, ¥3,300 on weekends and public holidays, and ¥3,400 on specified dates. Night Spa after 18:00 is ¥1,800 / ¥2,400 / ¥2,500 respectively. Swimwear rental ¥500. Scheduled maintenance closure: 2026-11-09 to 2026-11-13.
Tattoo policy: Tattoos, including tattoo stickers, are prohibited; no cover-sticker exception is published. Guests under 13 are not admitted.

Spring & water temperature

Spring-source temperature: 34.8°C.
Bathing temperature: Not published for the natural spring pools.

Spring source: Toshimaen Niwa-no-Yu's own spring, drawn from 1,445 m underground.
Spring classification: Iodine-bearing, strongly saline sodium chloride spring.
pH: Not published.
Flow rate: Not published.
Water handling: The operator confirms spring water in the separate men's and women's bathing areas, outdoor rock bath and reclining bath, plus an outdoor massage pool in the shared swimwear Bade zone. Complete water-addition, heating, circulation and disinfection conditions are not published pool by pool; the whole facility should not be described as source-flowing.

The outdoor natural-spring massage pool is in the shared swimwear zone; nude bathing areas and indoor saunas are separated by gender. There is no on-site parking.

Bath experience

Comfort

9.0/10

Bath variety

9.5/10

Upkeep

8.5/10

Atmosphere

9.5/10

Quiet

7.0/10

Access

9.5/10

Value

8.0/10

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.

Spring vs. bath temperature Spring quality & water handling

Sources