By Season

Winter at KOSA Year of Seasonal Delights

In crisp winter air, a grown-up escape warmed by moonlight, starry skies, and the fireplace.

Wakasagi Smelt Fishing — The Colder It Gets, The More Exciting It Is
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Wakasagi Smelt Fishing — The Colder It Gets, The More Exciting It Is

Winter in Yamanashi brings crisp, still air and a deep chill. Try wakasagi (smelt) fishing inside a heated dome, warm even in the cold. Even first-timers can experience the thrill of a catch — enjoy your wakasagi as tempura with a beer for the perfect day off.

Winter Is for True Totonou — A Natural Sauna Finished with Lakeside Open-Air Rest
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Winter Is for True Totonou — A Natural Sauna Finished with Lakeside Open-Air Rest

Experience the true pleasure of an outdoor sauna by the lake. Feel alive in the winter sauna, watching steam rise from your body with every breath.

Savor an Exquisite Wood-Fired Course, Richer in Flavor with Winter Fat, Alongside a Fine Wine
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Savor an Exquisite Wood-Fired Course, Richer in Flavor with Winter Fat, Alongside a Fine Wine

Yamanashi is home to Koshu Wine Beef and Koshu Fuji Sakura Pork, both richer and more flavorful with winter fat. Paired with warming root vegetables, enjoy a wood-fired course that slowly warms you from within, alongside a glass of wine.

A Deepening Winter Night on Lake Kawaguchiko
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A Deepening Winter Night on Lake Kawaguchiko

An evening of deep conversation in a warm room, gazing out at Lake Kawaguchiko under a cold winter sky.

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