Hakodate | Minanohama Onsen, a legendary underwater hot spring that disappears at high tide

#July2025 Best Places

✓ Mizunashi Kaihin Hot Spring

Legend has it that Mizunashi Kaihin Hot Spring, located along the coast of Cape Eyama in Hakodate, is a submerged hot spring that disappears at high tide. Its daily opening hours are tied to the tide, so be sure to check the tides and opening hours online beforehand, as the pool disappears at high tide.

Mizunashi Kaihin Hot Spring is located on the eastern shore of Mount Eyama, an active volcano. The water temperature ranges from 40 to 65 degrees Celsius, but the Pacific Ocean stretching out before you makes it a pleasant, comfortable temperature.

Mizunashi Kaihin Hot Spring is a natural hot spring open 24 hours a day, 365 days a year. It is a mixed-gender open-air bath, so swimwear is required.

Post by Moutain | Jul 29, 2025