Founded in 1983.I have been working with passion for over forty years.Not a trend, but a foundation of trust built up over time.There are authentic saunas that go beyond just being new.
The real thing transcends time.
Founded in 1983.We have been chosen by our customers for over forty years.
Rainbow Shin-Koiwa is a sauna and capsule hotel located a 3-minute walk from JR Shin-Koiwa Station, open 24 hours a day.
A sauna with temperatures exceeding 110℃.
A quiet, introspective meditation sauna.
Three unique saunas and two cold plunge pools with different temperature ranges.
Experience the profound sense of "totonoi" (a state of deep relaxation and well-being) created by the interplay of heat and cold.
Even before the sauna boom, we continued to refine our heat and welcome people without being swayed by trends.
Newness alone is not enough to create something new.
The sense of security, comfort, and genuine sauna quality that can only be cultivated through accumulated time.
On my way home from work.For refreshing yourself on your days off.As a destination for a sauna trip.
A place you'll want to return to again and again.
That's Rainbow Shin-Koiwa.
Founded in 1983.We have been chosen by our customers for over forty years.
Rainbow Shin-Koiwa is a sauna and capsule hotel located a 3-minute walk from JR Shin-Koiwa Station, open 24 hours a day.
A sauna with temperatures exceeding 110℃.
A quiet, introspective meditation sauna.
Three unique saunas and two cold plunge pools with different temperature ranges.
Experience the profound sense of "totonoi" (a state of deep relaxation and well-being) created by the interplay of heat and cold.
Even before the sauna boom, we continued to refine our heat and welcome people without being swayed by trends.
Newness alone is not enough to create something new.
The sense of security, comfort, and genuine sauna quality that can only be cultivated through accumulated time.
On my way home from work.For refreshing yourself on your days off.As a destination for a sauna trip.
A place you'll want to return to again and again.
That's Rainbow Shin-Koiwa.
