[Yamanakako Sauna] 'VIHTA Yamanakako' with a 150cm Deep 'Diveable Natural Cold Bath' Achieves a Milestone! 100 Reviews and a Perfect 5.0 Star Rating in 3 Months Since Opening [Location Shoots Welcome]

Koyama Co., Ltd. (169 Yamanaka, Yamanakako-mura, Minamitsuru-gun, Yamanashi Prefecture) opened 'VIHTA Yamanakako,' an accommodation facility with a private sauna in the Yamanakako area of Yamanashi Prefecture, on January 7, 2026.

In just three months since opening, the number of reviews on Google Maps has exceeded 100. Furthermore, it recorded an astounding regional-fastest customer satisfaction rate with an average rating of 5.0 (perfect score).

This facility is attracting attention as a Yamanakako sauna, private sauna, and accommodation sauna. It offers a 'stayable sauna experience' designed as a unified space featuring a sauna, open-air bathing area, hot bath, and the area's largest* 150cm deep pipe cold bath using natural underground water from Mt. Fuji. Also, through crowdfunding on Makuake, it achieved over 500 percent of its target support.

https://www.makuake.com/project/vihta-150cm/

Building on this overwhelming support and track record, starting today, we are fully beginning to accept 'corporate team building' and 'location filming for media and TV programs' utilizing our characteristic facilities, including the 150cm deep cold bath. Corporate private reservations are 15% off until the end of May, and we flexibly welcome consultations for media filming depending on the content.