Honouring Japanese Traditions And Culinary Craftsmanship


A contemporary izakaya inspired by the nature-spirited roots and duality of Mount Fuji.

The menu presented by Executive Chef Rhys Cattermoul showcases a broad spectrum of Japanese cuisine through delicate umami flavours and responsibly sourced ingredients.

Cosmos Of KOYN


With an appreciation of balancing modernity with tradition, alongside simplicity and harmony, our Grosvenor Street dining destination is divided into two distinct yet streamlined spheres: MIDORI and MAGMA.

Koyn Bar


As you passage through MIDORI towards MAGMA sits our residential KOYN Bar.

Amidst new discoveries and old favourites, sip on whimsical cocktails, and discover our hand-picked collection of sakes and bespoke Japanese whiskies as you choose to begin or end your experience with us.

Japanese Sushi Restaurant Mayfair Grosvenor Square

Our Story


Journey with us as we capture the complementary forces at play in Japan’s most majestic volcano
Journey with us as we capture the complementary forces at play in Japan’s most majestic volcano

Situated off Mayfair’s resplendent Grosvenor square, KOYN is housed in what was formerly both the US Embassy and Canadian High Commission at 38 Grosvenor Street.

Japanese Sushi Restaurant Best Mayfair

OPENING HOURS

Monday to Saturday
Lunch: 12:00 — 14:30
Dinner: 17:30 — 22:30

Sunday
Lunch: 12:00 — 15:00
Dinner: 17:30 — 22:00