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KOYN Japanese, London, Greater London

KOYN Japanese

4.5
4.5
250 Reviews
£41 and over
Japanese

Make a reservation

2 people
7:00 PM
Booked 11 times today
Experiences are available.
  • Good for special occasions
  • Good for business meals
  • Charming
A multifaceted Asian dining destination in the heart of Mayfair. Discover our contemporary Japanese dining and our Izakaya style KOYN bar.

KOYN Japanese is located on our ground floor of Mayfair's Grosvenor Square and is a celebration of the timeless artistry of Japanese cuisine elevated by a contemporary approach.
The kitchen led by Executive Chef Rhys Cattermoul presents a menu highlighting the true essence of each ingredient, guided by a philosophy that embraces innovation while respecting tradition, to showcase the broad spectrum of Japanese cuisine through rich umami flavours and locally sourced produce.

KOYN's philosophy places value on subtlety and detail through an amalgamative lens where art, design, and textile traditions meet culinary craftsmanship.

Dining areas

Additional information

  • Location
    38 Grosvenor St, London, Greater London W1K 4QX
  • Phone number
    020 3535 2000
  • Price
    £41 and over
  • Cuisines
    Japanese
  • Hours of operation
    Lunch Daily 12:00 pm–2:15 pm Dinner Mon–Sat 5:30 pm–10:15 pm Sun 5:30 pm–10:00 pm
  • Dress code
    Smart Casual
  • Parking details
    Street Parking
  • Payment options
    AMEX, Mastercard, Visa
  • Executive chef
    Rhys Cattermoul
  • Delivery & takeout
    Order direct

Experiences

  • Sushi Omakase Experience

    £108.00 per person

    Multiple dates available
    A curated Omakase experience to be enjoyed at our elegant sushi counter. LOBSTER AVOCADO SENBEI yuzu truffle miso WHITE FISH NIGIRI SALMON creamy spicy Aburi NASU KARASHI SU MISO UNAGI KINOME NIGIRI KING CRAB NIGIRI EBI NIGIRI SABA, SHIRO KONBU NIGIRI TORO CAVIAR NIGIRI WAGYU NIGIRI truffle MINI CHILEAN SEABASS shiso salsa verde PASSION FRUIT PANNA COTTA coconut sorbet, ginger crumble £108pp
    Sushi Omakase Experience Photo

Menu

View menu on restaurant's website

What 250 people are saying

Overall ratings and reviews

Reviews can only be made by diners who have eaten at this restaurant

4.5
4.5 based on recent ratings
  • 4.6Food
  • 4.6Service
  • 4.4Ambience
  • 4.1Value

Noise • Moderate

Review summary

AI-generated from verified diner reviews
KOYN Japanese in Mayfair is praised for its "fantastic food" and "friendly and attentive service." Diners enjoy the fresh, flavorful sushi and beautifully presented dishes. The restaurant's vibrant atmosphere and "amazing dining experience" are notable, though some suggest improvements in pacing and organization. Overall, it's highly recommended for exceptional Japanese cuisine.
250 Reviews

  1. peter

    London

    2 reviews

    5.0

    2 reviews

    Dined on February 21, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Amazing night, fantastic and friendly service, great Sommelier. The food was perfect. Thanks.

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  2. Georgy

    London

    1 review

    4.0

    1 review

    Dined on February 14, 2025

    1. Overall 4
    2. Food 5
    3. Service 5
    4. Ambience 4
    Excellent food and service! Ambience was pleasant but nothing super special, and so good but not outstanding value for money.

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  3. Aaron

    London

    4 reviews

    5.0

    4 reviews

    Dined on February 13, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Fantastic restaurant. Amazing food and great service! Definitely be going again!

    Is this helpful?

  4. Dean

    London

    1 review

    2.0

    1 review

    Dined on January 22, 2025

    1. Overall 2
    2. Food 3
    3. Service 1
    4. Ambience 2
    Not a great experience. Staff were disorganised from the point of arrival. We had to ask three times for the drinks we had ordered, staff also knew very little about the food being delivered to our table. Food was distinctly average. Pretty disappointing all round.

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  5. Cevdet

    Washington DC

    10 reviews

    3.0

    10 reviews

    Dined on January 16, 2025

    1. Overall 3
    2. Food 3
    3. Service 3
    4. Ambience 3
    Sushi quality was OK but below my expectation and overpriced

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  6. JAMES

    Northampton

    3 reviews

    5.0

    3 reviews

    Dined on January 11, 2025

    1. Overall 5
    2. Food 5
    3. Service 4
    4. Ambience 4
    Fantastic food, we were the first on the new counter omakase set menu, could have been slowed down just a little, we were in and out in 45 mins and would have loved to spend longer enjoying the experience and try more cocktails.

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  7. Barbara

    London

    1 review

    4.0

    1 review

    Dined on January 9, 2025

    1. Overall 4
    2. Food 5
    3. Service 5
    4. Ambience 4
    Excellent food and very friendly and attentive service.

    Is this helpful?

  8. Norman

    VIP

    Western NC

    29 reviews

    5.0

    29 reviews

    Dined on December 31, 2024

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    NY menu was great with wine pairings. Service was great atmosphere was very nice

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  9. Andreia

    London

    1 review

    3.0

    1 review

    Dined on December 30, 2024

    1. Overall 3
    2. Food 3
    3. Service 4
    4. Ambience 4
    For a festive tasting experience the dishes were rushed through. Half of them were okay not great and the dessert was disappointing for this kind of restaurant. Didn’t agree with the sharing plates kind of idea for the type of food provided. Should be individual portions. This would allow the experience to be more personal and elegant. The wine price was accessible and kept in a good temperature.

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  10. Ömer

    VIP

    London

    6 reviews

    5.0

    6 reviews

    Dined on December 24, 2024

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Sushi and the starters were great, keep up the good work 👏👏👏

    Is this helpful?

FAQs

KOYN Japanese offers takeout which you can order by calling the restaurant at 020 3535 2000.

KOYN Japanese is rated 4.5 stars by 250 OpenTable diners.

Yes, you can generally book this restaurant by choosing the date, time and party size on OpenTable.

Make a reservation

2 people
7:00 PM
Booked 11 times today
Experiences are available.
Google Map for KOYN Japanese

38 Grosvenor St, London, Greater London W1K 4QX

Dining areas

Additional information

  • Phone number
    020 3535 2000
  • Price
    £41 and over
  • Cuisines
    Japanese
  • Hours of operation
    Lunch Daily 12:00 pm–2:15 pm Dinner Mon–Sat 5:30 pm–10:15 pm Sun 5:30 pm–10:00 pm
  • Dress code
    Smart Casual
  • Parking details
    Street Parking
  • Payment options
    AMEX, Mastercard, Visa
  • Executive chef
    Rhys Cattermoul
  • Delivery & takeout
    Order direct
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