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KOYN Japanese, London, Greater London

KOYN Japanese

4.5
4.5
230 Reviews
£41 and over
Japanese

Make a booking

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.

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 (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

  • 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. Kindly note the menu is available for a minimum of 2 guests.

  • Omakase Festive Menu

    GBP 88.00 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 Festive menu. Kindly note the menu is available for a minimum of 2 guests.

  • Nik Eksted & Koyn

    GBP 98.00 per person

    22 Jan 2025 only
    A one-night-only collaboration at KOYN Executive Chef Rhys Cattermoul joins forces with Michelin-starred Nordic chef Niklas Eksted, for an exclusive 6-course menu drawing from Eksted Nordic gastronomy and open-fire cooking and Cattermoul approach to Japanese izakaya dining. Welcome Drink Oyster Flambadou, Raw Beef with Vendace Roe and Crusade Nik Eksted Tuna Tartare, Black Garlic Boy & Bone Marrow Rhys Cattermoul Birch-Fired Trout, Mangalica Pork with Grilled Vegetable Butter Nik Eksted Chilean Seabass, Wasabi Shiso and Salsa Verde Rhys Cattermoul Juniper grilled deer, Beetroot and Salted Plum Nik Eksted Chocolate Wart, whiskey Soy and Meringue, seared with charcoal Rhys Cattermoul

Menu

View menu on restaurant's website

What 230 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 offers a refined dining experience with "great food and excellent service." Known for its lively atmosphere and prime location, it excels in creative dishes crafted from high-quality ingredients. Though some find portions small, the "presentation is visually stunning" and the staff attentive, ensuring a memorable visit.

230 Reviews

  1. Wisam

    London

    1 review

    3.0

    1 review

    Dined 4 days ago

    1. Overall 3
    2. Food 4
    3. Service 2
    4. Ambience 2
    Readable food, nothing special. The service is poor and lacks refinement.

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  2. Gail

    Bedfordshire

    1 review

    3.0

    1 review

    Dined 7 days ago

    1. Overall 3
    2. Food 3
    3. Service 2
    4. Ambience 3
    The staff who greeted us and served us in the restaurant were not warm and acted confused that we were there for a table booking however the team at the bar were great. We had the tasting menu which was mostly delicious except the tempura squid which had so much batter you couldn’t taste the squid. Tempura should be light and this was more this pub batter. We were also surprised that for £216 they served a small desert to share, no bigger that a single persons portion. It was a shame as it tainted the end of the meal and felt like poor value.

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  3. Alexandra

    London

    3 reviews

    4.0

    3 reviews

    Dined on 7 December 2024

    1. Overall 4
    2. Food 3
    3. Service 4
    4. Ambience 4
    The generic overpriced Asian restaurant, very limited menu but nice inside

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  4. katy

    London

    56 reviews

    3.0

    56 reviews

    Dined on 5 December 2024

    1. Overall 3
    2. Food 3
    3. Service 4
    4. Ambience 3
    Portions are Very Very small Specifically lamb dish 3 the smallest piece of lamb for £42 Sushi was half of the size of the sushi we had to have elsewhere… seriously tiny pieces We wouldn't rush back

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  5. ali

    London

    2 reviews

    4.0

    2 reviews

    Dined on 5 December 2024

    1. Overall 4
    2. Food 4
    3. Service 5
    4. Ambience 3
    Good food and excellent service, what more can one ask for

    Is this helpful?

  6. Khalid

    London

    1 review

    5.0

    1 review

    Dined on 2 December 2024

    1. Overall 5
    2. Food 5
    3. Service 4
    4. Ambience 5
    Very well mannered staff, Polite, Attentive, Considerate. Delicious food as well.

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  7. Meltem

    VIP

    San Francisco

    17 reviews

    3.0

    17 reviews

    Dined on 2 December 2024

    1. Overall 3
    2. Food 4
    3. Service 2
    4. Ambience 2
    I think food was good… atmophere was plain and formal The cutest one was the little car decorated outside inside plain for a holiday season… service was pretty bad.. one lady was looking all tables, we had to chase them asking for more sparkling water many many times.. they have to work On that hiring more people and attentive attitude. But this is not her fault, one server is not enough…

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  8. Barry

    VIP

    London

    5 reviews

    5.0

    5 reviews

    Dined on 30 November 2024

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    A really excellent evening....food ans service exceptional

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  9. Hajra

    London

    6 reviews

    5.0

    6 reviews

    Dined on 29 November 2024

    1. Overall 5
    2. Food 5
    3. Service 4
    4. Ambience 5
    Love it, food was excellent: if you could like make the make rolls a little bigger please.

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  10. Lorna

    New York City

    1 review

    3.0

    1 review

    Dined on 23 November 2024

    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.

    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 230 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 11 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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