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KOYN Japanese, London, Greater London

KOYN Japanese

4.5
4.5
236 Reviews
£41 and over
Japanese

Make a booking

2 people
19:00
Booked 6 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
    Gluten-free Options, Vegan

Experiences

  • Omakase Feasting Menu

    £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

    £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

    £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 236 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.

236 Reviews

  1. Ömer

    London

    4 reviews

    5.0

    4 reviews

    Dined 3 days ago

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

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  2. Adela

    London

    1 review

    5.0

    1 review

    Dined 4 days ago

    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.

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  3. Mr

    London

    1 review

    5.0

    1 review

    Dined 4 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    My time at Koyo Japanese was simply amazing! The place was buzzing with energy, and the staff was incredibly friendly. I started with the starter dish, which I believe is called crispy tuna rice. It was to die for! The menu had a great variety of options, and I really enjoyed exploring all the choices. Overall, it was an incredible experience, and I highly recommend Koyo Japanese to anyone looking for a fantastic dining experience. And on a personal note, one of the staff members, I think her name was Anka, was absolutely amazing. She helped us pick out the perfect dish and was so humble about it.

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  4. Eris

    London

    1 review

    5.0

    1 review

    Dined 4 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Delicious food Amazing staff Nice atmosphere Will be back soon

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  5. Jenny

    London

    1 review

    5.0

    1 review

    Dined 4 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    The best Japanese in town with the most amazing food and service. Highly recommend. Looking forward to see you again soon!

    Is this helpful?

  6. Priyankaa

    VIP

    London

    1 review

    1.0

    1 review

    Dined 5 days ago

    1. Overall 1
    2. Food 4
    3. Service 1
    4. Ambience 2
    The lady who received us was quite rude! She was very unwelcoming and when while leaving the door was so heavy that we couldn’t open it and she made it sound like it’s our fault!

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  7. Wisam

    London

    1 review

    3.0

    1 review

    Dined on 17 December 2024

    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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  8. Gail

    Bedfordshire

    2 reviews

    3.0

    2 reviews

    Dined on 14 December 2024

    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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  9. 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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  10. 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

    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 236 OpenTable diners.

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

Make a booking

2 people
19:00
Booked 6 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
    Gluten-free Options, Vegan
  • 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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