KOYN Japanese

4.5

242 Reviews

£41 and over

Japanese

Make a reservation

2 people

Jan 1, 2025

7:00 PM

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
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

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

What 242 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.

243 Reviews

N
Norman
VIP
Western NC
28 reviews
5.0
28 reviews
Dined 1 day ago
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
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A
Andreia
London
1 review
3.0
1 review
Dined 2 days ago
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.
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Ö
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?
A
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.
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C
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.
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J
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?
A
Athira
London
1 review
5.0
1 review
Dined on December 23, 2024
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 😍😍
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M
Mr
London
1 review
5.0
1 review
Dined on December 23, 2024
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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A
Aleks
London
1 review
5.0
1 review
Dined on December 23, 2024
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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R
Rentina
London
2 reviews
5.0
2 reviews
Dined on December 23, 2024
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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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 242 OpenTable diners.

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

Make a reservation

2 people

Jan 1, 2025

7:00 PM

Booked 6 times today

Experiences are available.

Order delivery or takeout

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.

KOYN Japanese

Make a reservation

Order delivery or takeout

Dining areas

Additional information

Experiences

Nik Eksted & Koyn

Menu

What 242 people are saying

Overall ratings and reviews

Review summary

FAQs

Does KOYN Japanese offer delivery through OpenTable or takeout?

How is KOYN Japanese restaurant rated?

Is KOYN Japanese currently accepting reservations?

Make a reservation

Order delivery or takeout

Dining areas

Additional information