Toi Onsen is a hot spring area on the western side of the Izu Peninsula in Shizuoka Prefecture, facing Suruga Bay. The setting gives it a quieter, more open feel than many inland resort towns, with sea views and a coastline that shapes the pace of the place as much as the baths do.
It works well for travelers who want an onsen stay with a strong sense of the shore rather than a densely built spa town. Traditional inns and bathing facilities are part of the local rhythm, and the area is especially appreciated for its broad bay scenery and the evening light over the water.