U-Neru Natural Onsen
天然温泉 湯～ねるてんねんおんせん ゆ～ねる
Natural saline onsen spa complex with ganbanyoku and capsule hotel, inside a Narashino shopping center
Day Use
YesBathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Cold water plunge bath, typically used after sauna
Bathing Arrangements
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
Entry permitted if all tattoos fully covered with skin cover sheets sold on-site
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
Towels to rent or borrow at the desk
Relaxation space for after bathing
On-site or nearby parking available
Highlights
Ganbanyoku
Jet BathAbout
U-Neru sits on the second floor of a shopping center near Shin-Narashino station, but don't let that fool you: the bathing lineup is genuinely full-scale. The natural spring water is strongly salty and runs fresh (kakenagashi, 源泉掛け流し) in the dedicated bath. Alongside it you'll find an outdoor reclining bath, a panoramic outdoor bath, a jet bath, a high-concentration carbonated bath, and a rotating event bath. The sauna runs at 100°C with regular aufguss (Aufguss) sessions on select days. The ganbanyoku (岩盤浴) area has four rooms, including a cool-down room. Capsule hotel cabins are available for overnight stays, and a food court with four restaurants keeps you well fed without leaving the building.
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Last updated September 19, 2026