Shionoyu Onsen Rengetsu is a luxury hot spring ryokan located deep in the Shiobara Valley in Tochigi Prefecture. Opened in 2022 by Kyoritsu Resort, the property offers a quiet, forested retreat with all rooms featuring private onsen baths.

• All guest rooms are equipped with private hot spring baths using natural sodium-chloride spring water, known for its skin-soothing properties.

• The main public bath area includes indoor and open-air baths, a sauna, and a rock bath (ganbanyoku).

• Three private open-air baths are available for free on a first-come, first-served basis.

• Spa treatments, massage services, and an in-house lounge bar are available for guests.

• Breakfast and dinner are served in a dining hall that highlights local ingredients and seasonal dishes.

Onsen Facilities

• Public bath hours: 2:00 PM – 11:00 AM (closed 2:00 AM – 4:00 AM for cleaning)

• Rock bath: 2:00 PM – 12:00 AM and 5:00 AM – 10:00 AM

• Private open-air baths: Available 24 hours, except during midday cleaning (10:00 AM – 2:00 PM)

Access

• 45 minutes by car or shuttle from Nasushiobara Station (shuttle reservation required)

• Free parking available; some rooms may require use of an off-site parking lot with shuttle transfer

Check-in / Check-out

• Check-in: From 3:00 PM

• Check-out: By 11:00 AM

Who It’s For

Rengetsu is ideal for couples, families, or solo travelers looking for a quiet, high-end onsen experience surrounded by forest and valley views. It’s especially recommended for those who value privacy and relaxation in a refined setting.