Mizusawa Onsenkyo is a simple thermal spring cluster in Semboku City, Akita Prefecture, located alongside the Tazawako-Kogen Onsenkyo near the shores of Lake Tazawa—Japan's deepest lake—and the volcanic profile of Mt. Akita-Komagatake, one of Tohoku's most celebrated alpine peaks for summer hiking and winter skiing. The simple alkaline waters of Mizusawa provide the accessible, skin-softening mineral soak that complements a day of hiking Komagatake's alpine flower trails in summer or skiing the adjacent slopes in the heavy snow of an Akita highland winter. Together with its Tazawako-Kogen neighbor, Mizusawa forms a rich highland resort zone where volcanic mountain, sacred deep lake, and thermal spring create a layered environment of natural beauty and seasonal recreation.
Insider tip — Mizusawa Onsenkyo is a quiet onsen village nestled in the highlands near Lake Tazawa, offering simple thermal baths in a serene mountain setting. The alkaline waters are soft and gentle, suitable for bathing multiple times a day without irritating sensitive skin. The location makes it a perfect base for exploring the Nyuto Onsen district to the north. Local ryokan here serve excellent Akita cuisine including kiritanpo hot pot.