| Ofuro Café Utatane | Saitama | In-house accommodation with guest rooms | A bathhouse combined with a café. Offers Scandinavian-style rooms, private sauna huts, and hot spring water from Hakujyu-no-Yu. |
| Yokohama Minato Mirai Manyo Club | Kanagawa | In-house accommodation with guest rooms | Natural hot spring water brought from Atami and Yugawara. Open 24h with saunas, stone baths, and overnight stays. |
| Taiko no Yu | Toyama | Hotel Taiko no Yu | Guests can access the hot spring spa just 20 seconds away for free. 100% natural spring water with many baths and saunas. |
| Agaryanse (Spa Resort Ogoto) | Shiga | Hotel Koto-yu | By Lake Biwa. Hotel guests use baths free on check-in and check-out days. Open-air baths, stone spa rooms, and relaxation spaces. |
| Sakaihama Rakuten Onsen Shofuku | Osaka | Capsule hotel on-site | Seaside hot spring with open-air baths, carbonated springs, and a hydrogen salt sauna. Capsule rooms available. |
| SpaWorld Hotel & Resort | Osaka | Designer resort hotel (directly connected) | Huge spa resort with baths themed after countries, plus pools, saunas, and stone baths. Hotel accommodation available. |
| Terme VILLA Chula-U | Okinawa | Adjacent to The Beach Tower Okinawa | Resort-style hot spring with water from 1,400m underground. Healing pool and multipurpose pools, popular with families. |
