Mimata Onsen: Hot Spring Guide & Visitor Access

Welling up in a quiet mountain hollow in Kanagi, Hamada City, Mimata Onsen is an Iwami beauty spring known for water as smooth as lotion. With more than a century and a half of history since its founding, it has long been cherished by locals as a place of healing. A handful of inns stand beside a clear stream in this simple spa, and its unpretentious hospitality and fine water draw bathers from afar. The strongly alkaline water gently lifts grime from the skin, leaving a smooth feel that is widely praised.

Highlights

The greatest appeal of this spring is the water itself. Clear, colorless, and faintly thick alkaline water wraps the skin gently, and the lingering softness after a bath is widely praised. A public rest center offers day bathing, where you can enjoy the fine water among the locals. All around lies a green mountain village, perfect for relaxing to the murmur of the river.

Enjoying the Seasons

In spring, fresh greenery tints the valley, and bath hopping in the clear air is a pleasure. Summer brings the cool of the riverside, and a stay to the sound of cicadas stirs a traveler mood. Autumn deepens the surrounding foliage, giving the moist air after a bath an even richer feel. In winter, the snowy village and the water that warms you to the core are a special treat.

Access and Basic Information

The onsen sits in Oihara, Kanagi, Hamada City. From JR Hamada Station on the Sanin Main Line it is about 40 minutes by community route bus, or reachable by car inland. It is only about 7 km from the Kanagi smart interchange on the Hamada Expressway, making it convenient to reach by car. Day bathing is available at the rest center, so you can drop by easily while touring the Iwami region.

A Quick Tip

Because the water is silky, it is best not to scrub it off after your bath but to keep the moisture on your skin. Nature trails nearby let you enjoy both the bath and the outdoors. Savor this beauty water to your heart content in the quiet hills.

Practical Travel Notes

• Water and temperature: An alkaline simple spring, hypotonic and alkaline. The source is about 41.6 degrees Celsius with a high pH of 9.7, giving the silky, skin smoothing feel of a beauty bath.
• Bathing: Day bathing is available at the public rest center, with entry typically a few hundred yen. A new day bathing facility is also planned to open in the area at the end of 2026.
• Access: About 40 minutes by Hamada community route bus from JR Hamada Station on the Sanin Main Line. It is about 7 km from the Kanagi smart interchange on the Hamada Expressway, so a car is convenient.
• Note: As the water is highly alkaline, keep the moisture rather than rinsing too much after your bath. Confirm hours and closing days in advance.