Arai Ryokan

Arai Ryokan sits in Shuzenji Onsen, Izu City, Shizuoka, and is among the oldest and most architecturally significant ryokan on the Izu Peninsula. Its bathing hall is registered as a national Tangible Cultural Property, built from wood in a traditional style dating back over a century, and remains in active use rather than preserved purely as a museum piece. The hot spring water feeding both the indoor bathhouse and the riverside outdoor rotenburo comes directly from Shuzenji's natural source, the same hot spring lineage said to have been discovered by the monk Kobo Daishi over a thousand years ago. The riverside outdoor bath overlooks the Katsura River, which runs through the center of Shuzenji Onsen town, giving bathers a view of the wooded riverbank while soaking. Day-use bathing is offered on a limited basis, generally around midday, since Arai Ryokan operates primarily as an overnight inn and prioritizes bathing access for its overnight guests. Reservation ahead is recommended given the limited day-use slots and the property's reputation, which draws visitors specifically to experience the historic bathing hall. The inn's broader grounds also include traditional gardens and preserved architecture, reinforcing the sense of stepping into a historic property rather than a modern spa facility. For visitors interested in Japan's onsen history and traditional ryokan architecture, Arai Ryokan's bathhouse is one of the most notable stops in Shuzenji Onsen, distinct from the town's public bathing facilities.