KOS HOTEL & RESTAURANT Japanese Book Now
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Yamanashi, Lake Kawaguchi

KOS HOTEL & RESTAURANTA Place of Everyday Happiness

At Lake Kawaguchiko, green hills, open sky, and shifting mountain hues rest gently on the water's surface. Here, time slows, and the everyday luxury of watching the seasons change with your own eyes unfolds naturally. "KOS" is a Norwegian word — from one of the happiest nations on earth — meaning coziness, relaxation, and the quiet joy of ordinary moments. We are a restaurant & hotel built around that feeling: the simple happiness of sharing good food and laughter with the people who matter most, and the deep contentment that comes with it.

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Why KOS

Six Reasons to Choose KOS

Newly Opened, December 2025
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Newly Opened, December 2025

A brand-new whole-villa rental that had its grand opening in December 2025. State-of-the-art facilities, finished down to the smallest detail, promise a truly comfortable stay.

Refined Japandi × Wa-Modern Design
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Refined Japandi × Wa-Modern Design

A sophisticated interior that blends Japan's traditional 'wa-modern' beauty with the warmth of Scandinavian 'Japandi' style.

A Full Wood-Fired Course from Mt. Fuji's Foothills
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A Full Wood-Fired Course from Mt. Fuji's Foothills

A full wood-fired course built around the bounty of the foothills of Mt. Fuji. Choose from two menus — Standard and Premium.

A Lakefront Location on Lake Kawaguchiko
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A Lakefront Location on Lake Kawaguchiko

A front-row seat on the shores of Lake Kawaguchiko, with an unobstructed, iconic view of Mt. Fuji and the lake all to yourself.

Amenities by LEAF & BOTANICS
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Amenities by LEAF & BOTANICS

Enjoy a comfortable bath time with premium amenities from LEAF & BOTANICS, a brand born in the Lake Kawaguchiko area.

A Sauna & BBQ Space to Actively Enjoy the Ever-Changing Lake View
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A Sauna & BBQ Space to Actively Enjoy the Ever-Changing Lake View

Spring 2026 brought a brand-new private tent sauna and BBQ space. Actively enjoy the luxury of a setting with Lake Kawaguchiko spread out right in front of you.

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Wood-Fired DiningRESTAURANT

A restaurant with the inviting scent of a wood-fired oven, where warm, aged textures meet refined design. In this comfortable space, conversation flows easily over a meal. By night, it becomes a bar overlooking Lake Kawaguchiko through floor-to-ceiling glass — the perfect start to a quiet evening. The restaurant also welcomes guests who aren't staying at the hotel. Alongside our wood-fired course menus featuring seasonal ingredients from the foot of Mt. Fuji, we offer a day-use-only BBQ menu with all-you-can-drink included — a special outdoor dining experience on the shores of Lake Kawaguchiko.

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Japandi LivingROOM

A cohesive space built around vaulted ceilings and exposed beams. In the living room overlooking Lake Kawaguchiko, watch the fireplace flicker as you share a glass of wine or whisky with family and friends. True to the meaning of "KOS," it's a space where warm, everyday happiness comes naturally.

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Private Tent SaunaSAUNA

In spring 2026, a Private Tent Sauna arrived right on the front row of Lake Kawaguchiko — an unobstructed seat to the view. It's the ultimate uninterrupted sauna experience, made possible only by a whole-villa rental set on 1,200 m² of private grounds. The crackle of burning wood, the clean mountain air at the foot of Mt. Fuji, and the stillness of the lake spread out before you. Wrapped in steam from your own self-poured löyly, let body and mind return to nature's rhythm — a luxurious sense of "totonou," that blissful post-sauna clarity, taken further than the everyday.

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"Grande" is a membership resort offering purchasable usage rights, with luxury villas across Japan. Each property suits a different way of spending time, opening up a new kind of second-home lifestyle tailored to every occasion.

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