Inuyama Onsen is a small hot spring area in Inuyama, Aichi Prefecture, best known for its setting near the Kiso River and the historic castle town. It makes an easy pairing with a visit to Inuyama Castle, one of Japan’s best-known surviving castles, and offers a quieter, more relaxed side to a place often visited for its heritage landmarks.
What stands out here is the contrast between castle, river, and hot spring: a day can move naturally from strolling old streets and riverside paths to slowing down in a ryokan bath. Inuyama Onsen is not a large resort town, which is part of its appeal for travelers looking for an onsen stay that feels close to local history rather than separate from it.