ONSEN & SAUNA RESORT Kaihotsu no Yu is a multi-purpose wellness and leisure facility in Fukui City, Japan, operated by Yu Kikaku Co., Ltd. Rebranded in August 2026, it welcomes individuals, families, and groups to enjoy hot springs, saunas, fitness, dining, and relaxation under one roof. Its natural hot spring water rises from 1,300 meters underground, and the bathing area includes a high-concentration carbonated spring. Guests can also unwind in dedicated relaxation spaces, a children’s area, and a manga library, or visit the sauna and cold bath facilities.

Fitness services include a gym and studio classes such as yoga, Pilates, aerobics, and Zumba, available to facility visitors without an additional charge. Dining options include Echizen Shunmi Kaihotsu Dining, featuring seasonal Fukui ingredients, and Cafe & Bar Yururi. Other amenities include body care and relaxation services, karaoke, meeting and event rooms, and accommodation. The resort offers options for everyday visits, family outings, corporate gatherings, and overnight stays, with reservations, pricing, and event information available through its website.