A Tunnel Onsen Spa of Hotel San-Kai-Kan, Yunoko-Onsen Spa, Minamata-Shi, Kumamoto prefecture, Japan. Movie filmed around 14h00, Feb. 17, 2012.
Opened in 1953, Hotel San-Kai-Kan created a stunning Tunnel Onsen Spa in 1988, unfortunately closed for its bankrupt on Apr. 15, 2015.
The tunnel runs for about 30m long and leads bathers from inner bath to outer bath. Please enjoy the contrast between a gloomy tunnel and a luminous landscape of Yunoko Bay from the outer bath.