infinity-style bath; infinity-edge bath
A bath, especially at a hot spring, designed so that the water appears to merge with the horizon, similar to an infinity pool. Often found at scenic onsen resorts.
See also: インフィニティプール
From this inn's infinity-style bath, you can see the whole ocean.
The infinity-edge bath on the mountain gives you the feeling of becoming one with the sky.
From English 'infinity' + 風呂 (bath). A modern compound modeled after インフィニティプール (infinity pool).