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KOYN Japanese, London, Greater London

KOYN Japanese

4.6
4.6
221 Reviews
£41 and over
Japanese

Make a booking

2 people
7:00 pm
Booked 26 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
  • Area
    Mayfair
  • Cross Street
    Grosvenor Square
  • Parking details
    Street Parking
  • Public transit
    Nearest Tube Station is Bond Street <br />(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, Takeaway, Vegan, Wheelchair Access, Wine

Experiences

  • Cocktail Hour

    12 Nov 2024 - 29 Nov 2024
    Unlock the Night: Signature Cocktails, Conversations & a Little Secret Join us this festive season for Cocktail Hour at KOYN, Monday to Friday, 5:30 pm – 7:30 pm. Sip on our signature drinks, all available at £9 each—enjoy the umami flavours of the MIDORI Margarita, try our vibrant Lychee Bramble, or bold Hibiscus Negroni—an ideal moment to unwind, ready for the festivities. Unlock 15% off at KOYN Japanese And here’s a secret just for our community: after enjoying Cocktail Hour, you can settle in and savour 15% off our A La Carte Japanese menu. Simply quote the code "Happy15" when you book Cocktail Hour or walk in (subject to availability). Settle in and let the evening unfold.
    Cocktail Hour photo

  • KOYN Bar Residency - Röda Huset from Stockholm

    GBP 18.00 per person

    Prepaid

    27 Nov 2024 only
    Join us on 27th November in our Grosvenor Street residence for the second instalment of our bar residency series. Sweden’s Röda Huset's team (#31 on the World’s Best Bars list and winner of the Ketel One Sustainable Award 2023) will share its Nordic flavours and fun spirits with us at KOYN for one night only. Crafting world-class cocktails using indigenous Scandinavian ingredients like Varv tomatoes and Hälsingland plums, stay tuned to experience the innovation and style of Stockholm’s finest mixologists. *Ticket price include 1x cocktail and 1x snack per person on the night.
    KOYN Bar Residency - Röda Huset from Stockholm photo

  • Omakase Feasting Menu

    GBP 108.00 per person

    1 Nov 2024 - 30 Dec 2024
    Our dining destination and contemporary izakaya features Japanese cuisine that is authentic with a modern influence. Executive Chef Rhys Cattermoul showcases a broad spectrum of Japanese cuisine through delicate umami flavours and responsibly sourced ingredients. Leave it to us whilst you experience the Japanese tradition at its very best at KOYN, making every meal a celebration. Enjoy the festive season with our carefully curated Omakase Feasting menu.

Menu

View menu on restaurant's website

What 221 people are saying

Overall ratings and reviews

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

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

Noise • Moderate

Review summary

AI-generated from verified diner reviews
KOYN Japanese offers a vibrant atmosphere with "amazing" service and standout dishes like the stone-cooked Wagyu and tuna tacos. While some find the portions small and pricey, the culinary creativity and presentation impress many. Located in Mayfair, it's perfect for those seeking a lively and upscale dining experience.

221 Reviews

  1. Lorna

    New York City

    1 review

    3.0

    1 review

    Dined 2 days ago

    1. Overall 3
    2. Food 4
    3. Service 2
    4. Ambience 4
    Food on the whole was very good and the restaurant was lovely however, we were disappointed by the service which was frustratingly slow. We were regularly left waiting for long periods for our wine to be topped up which given the prices being charged wasn’t in line with our expectations. We were also a little disappointed that the restaurant asked when booking if we were celebrating anything however failed to acknowledge our celebration during our visit.

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  2. Oleksandra

    London

    3 reviews

    vip
    2.0

    3 reviews

    Dined 5 days ago

    1. Overall 2
    2. Food 3
    3. Service 2
    4. Ambience 2
    First of all there was too cold inside because of broken heating. A manager advised us to leave our coats with us and to order tea. However., when you pay more than £100 per person, you would like to get the best service and ambience. A service was very slow and food was tasteless . Having poor menu they managed to cook tasteless food excepting sushi nigiri. I don’t recommend to visit this restaurant.

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  3. Emmanouil

    London

    1 review

    5.0

    1 review

    Dined on 17 November 2024

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Excellent food and service. Top class restaurant. Highly recommended.

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  4. hashem

    New York City

    8 reviews

    vip
    5.0

    8 reviews

    Dined on 15 November 2024

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Great selection of wine amazing sushi Highly recommend

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  5. AhuR

    London

    1 review

    4.0

    1 review

    Dined on 14 November 2024

    1. Overall 4
    2. Food 5
    3. Service 5
    4. Ambience 4
    The meals were amazing. The only thing is resturant was a little empty and a little cold. And the prices a little too high specially for the nigiri/sashimis. I would reccomend this restaurant in a crowdes evening for a bettwe atmosphere and definitely wear long sleeve☺️

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  6. Joshua

    London

    1 review

    1.0

    1 review

    Dined on 9 November 2024

    1. Overall 1
    2. Food 3
    3. Service 3
    4. Ambience 1
    Having eaten at Koyn two years ago, it was literally one of my favourite restaurants. Well not anymore. Very rude woman at reception, heating was broken, and it was freezing. I tried to move to the Thai restaurant downstairs where it was warm but they wouldn’t let me. I persevered and was very cold and paid a lot of money to be cold. Not impressed with the manager handling of the issue and will never go back.

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  7. David

    Devon

    2 reviews

    4.0

    2 reviews

    Dined on 5 November 2024

    1. Overall 4
    2. Food 4
    3. Service 3
    4. Ambience 4
    Good food but average service, very disengaged staff and the dishes on the Festive menu arrived in the wrong order, no apologies 15% tip already included- curious who gets the tip??

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  8. OpenTable Diner

    London

    1 review

    2.0

    1 review

    Dined on 1 November 2024

    1. Overall 2
    2. Food 4
    3. Service 5
    4. Ambience 3
    Extremely expensive food - Me and my partner cannot see the reason why we paid 350£ for 2 people for an average quality meal. The service tho was excellent. Sorry we don’t recommend this place for food.

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  9. Liam

    Montreal

    10 reviews

    5.0

    10 reviews

    Dined on 30 October 2024

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Incredible service and attention to the detail from the staff

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  10. IpekG

    London

    7 reviews

    3.0

    7 reviews

    Dined on 28 October 2024

    1. Overall 3
    2. Food 3
    3. Service 3
    4. Ambience 4
    Okay Japanese food overall but nothing special. Pretty generic menu. Everything tastes good but nothing is amazing. I found the rock shrimp tempura soggy. Wagyu was okay.

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FAQs

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

KOYN Japanese is rated 4.6 stars by 221 OpenTable diners.

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

Make a booking

2 people
7:00 pm
Booked 26 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
  • Area
    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, Takeaway, 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.
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