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KOYN Japanese, London, Greater London

KOYN Japanese

4.5
4.5
241 Reviews
£41 and over
Japanese

Make a reservation

2 people
11:00 PM
Booked 8 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
  • Neighborhood
    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

  • Omakase Feasting Menu

    £108.00 per person

    Nov 1, 2024 - Dec 30, 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

    Nov 1, 2024 - Dec 30, 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

    Jan 22, 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 241 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
  • 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.

241 Reviews

  1. Ömer

    London

    4 reviews

    5.0

    4 reviews

    Dined 6 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 👏👏👏

    Is this helpful?

  2. Adela

    London

    1 review

    5.0

    1 review

    Dined 7 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.

    Is this helpful?

  3. Chris

    London

    1 review

    5.0

    1 review

    Dined 7 days ago

    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?

  4. Jonathan

    London

    1 review

    5.0

    1 review

    Dined 7 days ago

    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.

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  5. Athira

    London

    1 review

    5.0

    1 review

    Dined 7 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    “Anca and Sebastian should get at least 5 stars for their helpful service and good attitude. Thank you 😍😍

    Is this helpful?

  6. Mr

    London

    1 review

    5.0

    1 review

    Dined 7 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.

    Is this helpful?

  7. Aleks

    London

    1 review

    5.0

    1 review

    Dined 7 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    My recent visit to KOYN was nothing short of exceptional. We started with cocktails at the bar, which were expertly crafted and set the tone for an incredible evening. The service was outstanding, with the staff providing thoughtful attention to every detail, making us feel truly valued as guests. The waiters were highly knowledgeable and guided us on the perfect amount of food to order, even suggesting the black cod, which was absolutely divine. It’s a must-try dish! The sushi was among the best I’ve had in London—fresh, flavorful, and impeccably presented. The atmosphere was lively and vibrant, creating the perfect dining ambiance. Despite being busy, everything ran smoothly, and the overall experience was seamless. The food was worth every penny, reflecting the high-quality ingredients and artistry behind each dish. KOYN is a place I’ll definitely return to. Amazing food, impeccable service, and a fantastic vibe—this restaurant has it all! Highly recommended!

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  8. Rentina

    London

    2 reviews

    5.0

    2 reviews

    Dined 7 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Our first visit in Koyn was better than imagined! Heard a lot about this beautifully decorated and located restaurant in the heart of Mayfair. Warm and welcoming service! We chose to have dinner at the sushi countertop and was the best decision. We chose the omakase feasting menu with a great value. Expectations exceeded. Quality, ambience and service! What else would you be looking for?

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  9. Eris

    London

    1 review

    5.0

    1 review

    Dined 7 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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  10. Jenny

    London

    1 review

    5.0

    1 review

    Dined 7 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?

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 241 OpenTable diners.

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

Make a reservation

2 people
11:00 PM
Booked 8 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
  • Neighborhood
    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.
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