日本ナイトプロダクションズ株式会社 News Releases

A One-Time Gateway to a Place Only for the Invited — Invitation-Only Sauna 'YUUKA' Launches Kamori Spot Experience (¥11,000)

YUUKA, a private, invitation-only sauna located at the foot of Mount Kai-komagatake in Yamanashi Pre… · 2026-07-01

Secret, Invitation-Only Private Sauna 'YUUKA' Opens at the Foot of the Minami-Alps

An invitation-only, address-unlisted private sauna named 'YUUKA' has opened at the foot of Mt. Kaiko… · 2026-06-06