Enable JavaScript to run this app.
Skip to main content
OpenTable logo
  1. Home
  2. United Kingdom
  3. London
  4. West End (London)
  5. Mayfair
KOYN Japanese, London, Greater London

KOYN Japanese

4.5
4.5
247 Reviews
£41 and over
Japanese

Make a reservation

2 people
7:00 p.m.
Booked 19 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.

Order delivery or takeout

Dining areas

Additional information

  • Dining style
    Fine Dining
  • 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
  • Phone number
    020 3535 2000
  • Website
    http://www.koynrestaurants.com/
  • Payment Options
    AMEX, Mastercard, Visa
  • Dress code
    Smart Casual
  • Executive Chef
    Rhys Cattermoul
  • Catering
    Kindly note we do not offer outdoor catering.
  • Private party facilities
    Please contact the restaurant directly on 020 3535 2000 or reservations@koynrestaurants.com for further information.
  • Location
    38 Grosvenor St, London, Greater London W1K 4QX
  • Neighbourhood
    Mayfair
  • Cross Street
    Grosvenor Square
  • Parking details
    Street Parking
  • Public transit
    Nearest Tube Station is Bond Street (Davies Street and turn right on Grosvenor Street)
  • Additional
    Banquet, Bar/Lounge, Beer, Cocktails, Counter Seating, Delivery, Full Bar, Gluten-free Options, Non-Smoking, Private Room, Takeout, Vegan, Wheelchair Access, Wine

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 247 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
  • 4.5Service
  • 4.4Ambience
  • 4Value

Noise • Moderate

Review summary

AI-generated from verified diner reviews
KOYN Japanese offers an exceptional dining experience with "excellent food and very friendly and attentive service." The atmosphere is "lively and vibrant" and the sashimi is "incredibly fresh." Despite some service inconsistencies, the "impeccable service" and standout dishes like the "black cod" make it a must-visit in Mayfair.

247 Reviews

  1. Dean

    London

    1 review

    2.0

    1 review

    Dined 2 days ago

    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.

    Is this helpful?

  2. Cevdet

    Washington DC

    9 reviews

    3.0

    9 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

    Is this helpful?

  3. JAMES

    Northampton

    2 reviews

    5.0

    2 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.

    Is this helpful?

  4. 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?

  5. Norman

    VIP

    Western NC

    28 reviews

    5.0

    28 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

    Is this helpful?

  6. 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.

    Is this helpful?

  7. Ömer

    London

    4 reviews

    5.0

    4 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?

  8. Adela

    London

    1 review

    5.0

    1 review

    Dined on December 23, 2024

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Excellent service and food. Really enjoyed the Chilean Seabass and the crispy squid.

    Is this helpful?

  9. Chris

    London

    1 review

    5.0

    1 review

    Dined on December 23, 2024

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    It was an amazing experience and Koyn Japanese has topped in my favourite places to eat! The food is delicious and the service is cherry on top! Amongst my favourites were their Japanese style Nasu, rock shrimp tempura and the spinach ohitashi are to die for.

    Is this helpful?

  10. Jonathan

    London

    1 review

    5.0

    1 review

    Dined on December 23, 2024

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Amazing Japanese dining experience. The sashimi was incredibly fresh, and the sushi rolls were beautifully presented and full of flavor. The ambiance was calm and authentic, and the staff were attentive and friendly.

    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 247 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 p.m.
Booked 19 times today
Experiences are available.

Order delivery or takeout

Google Map for KOYN Japanese

38 Grosvenor St, London, Greater London W1K 4QX

Dining areas

Additional information

  • Cross Street
    Grosvenor Square
  • Neighbourhood
    Mayfair
  • 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
  • Price
    £41 and over
  • Cuisines
    Japanese
  • Dining style
    Fine Dining
  • Dress code
    Smart Casual
  • Parking details
    Street Parking
  • Public transit
    Nearest Tube Station is Bond Street (Davies Street and turn right on Grosvenor Street)
  • Payment Options
    AMEX, Mastercard, Visa
  • Executive Chef
    Rhys Cattermoul
  • Additional
    Banquet, Bar/Lounge, Beer, Cocktails, Counter Seating, Delivery, Full Bar, Gluten-free Options, Non-Smoking, Private Room, Takeout, Vegan, Wheelchair Access, Wine
  • Website
    http://www.koynrestaurants.com/
  • Phone number
    020 3535 2000
  • Catering
    Kindly note we do not offer outdoor catering.
  • Private party facilities
    Please contact the restaurant directly on 020 3535 2000 or reservations@koynrestaurants.com for further information.
Discover
OpenTable
  • About Us
  • Blog
  • Careers
  • Press
More
Our sites
Businesses
  • Delight more diners
  • Open for Business Blog
Join us on
  • Privacy Policy
  • Terms of Use
  • Cookies and Interest-Based Ads
  • Cookie Preferences
Copyright © 2024 OpenTable, Inc. 1 Montgomery St Ste 500, San Francisco CA 94104 - All rights reserved.
OpenTable is part of Booking Holdings, the world leader in online travel and related services.
Booking Logo
Priceline Logo
KAYAK Logo
Agoda Logo
OpenTable Logo