In ancient times, the gorge was inhabited by Shugendo Buddhist monks performing ascetic training on Mount Zao. It was close enough to the peak that they could hike up to worship the rising sun, and the hot spring waters helped their bodies recuperate from the rigorous training.

Gaga Onsen was officially established in 1875 and has been owned by the same family ever since. In its early days, people came primarily for the healing effect of the waters. Visitors were often laborers working physically demanding occupations such as farming or fishing. They would often stay for two or three months at a time. Facilities were rudimentary and visitors cooked their own meals in a communal kitchen.

As technology improved and the monetary wealth of Japan increased, demands on a laborer’s body became lesser, but on their time grew greater. As guests couldn’t stay as long and wanted to make the most of their relaxation time, the inn began cooking meals for guests and upgraded the facilities.

Gaga Onsen’s current incarnation is the work of sixth-generation owner Takeuchi-san, who renovated the inn according to his own design. His aim was to maximize the comfort and relaxation of guests. To him, this meant eschewing the stiff formality common at luxury ryokan inns. “At Gaga Onsen, we want guests to feel at home,” says Takeuchi-san.

The lobby exudes the coziness of a mountain lodge. Tables and chairs are clustered around a wood-stoked fireplace and a handsome book collection. The bar counter serves soft drinks and an expertly-curated selection of whisky, local sake, and wines from California and Yamagata. It is an ideal space for socializing.

The counterpoint to the cozy camaraderie of the lobby is the tranquility of the guest rooms themselves. They are spacious and sedate, with subtle touches that contribute greatly to the calming atmosphere. Radiant floor heating silently warms the rooms as large windows bathe them in sunlight. The overall effect is one of deep relaxation and healing.