KOYN Japanese

4.2 (269)

£41 and over

Japanese

38 Grosvenor St, London, Greater London W1K 4QX

About this restaurant

Charming
Good for special occasions
Good for business meals

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.

Permanently Closed

This restaurant is permanently closed.

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Dining areas

Additional information

Dining style
Fine Dining
Price
£41 and over
Cuisines
Japanese
Hours of Operation
Lunch Tue–Sat 12:00–14:30 Dinner Tue–Sat 17:30–22:30
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.
Delivery & takeout
Order direct

Location
38 Grosvenor St, London, Greater London W1K 4QX
Area
Mayfair
Cross Street
Grosvenor Square
Parking Details
Street Parking
Public transport
Nearest Tube Station is Bond Street (Davies Street and turn right on Grosvenor Street)
Additional
Gluten-free Options, Vegan

Reviews

OpenTable reviews from verified diners

Reviews from people who have dined at KOYN Japanese.

4.2

(269)

4.4Food
4.3Service
4.2Ambience
3.9Value

Noise • Moderate

268 Reviews

V
Viraj
New York City5 reviews
5.0
Dined on 23 August 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Amazing lunch with family and friends.. looking forward to the Thai venue
Is this helpful?
B
Benjamin
London2 reviews
5.0
Dined on 22 August 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
It is always a great feeling when you choose to spend your hard earned resources with an establishment and they don’t disappoint! Thoroughly enjoyed ourselves, food was delicious and service was excellent.
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D
Dominic Gold
London552 reviews
4.0
Dined on 20 August 2025
1. Overall 4
2. Food 4
3. Service 4
4. Ambience 3
I had a lovely lunch in the Japanese restaurant and everything was delicious. I ordered 5 smaller plates of sushi / sashimi / hot food and finished everything off. A nice carafe of saki as well, and I was in and out for just under £150. A lovely room and great service too.
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k
konstantinos
Yorkshire6 reviews
4.0
Dined on 1 August 2025
1. Overall 4
2. Food 4
3. Service 4
4. Ambience 4
Decent food in a nice environment , needs something more to stand out .
Is this helpful?
L
Lara Gold
London11 reviews
5.0
Dined on 19 July 2025
1. Overall 5
2. Food 4
3. Service 4
4. Ambience 5
Beautiful please was not too busy and not noisy. Great food and service.
Is this helpful?
B
Bruce Gold
Belgium107 reviews
4.0
Dined on 10 July 2025
1. Overall 4
2. Food 4
3. Service 5
4. Ambience 4
there are many places in the big cities, especially London who serve pretty much the same things albeit with the occasional tweak or modification so what makes the difference is the decor, the atmosphere and service. We really enjoyed our time and our meal. We will definitely be back!
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W
Wayne
Los Angeles1 review
2.0
Dined on 8 July 2025
1. Overall 2
2. Food 2
3. Service 2
4. Ambience 1
Service was very haphazard even though they were only serving 4-5 tables Food was nothing extraordinary, even their signature dishes Was disappointing as we had high expectations
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D
Deidra
Atlantic City / South Jersey Shore1 review
3.0
Dined on 3 July 2025
1. Overall 3
2. Food 4
3. Service 3
4. Ambience 4
It took 20 minutes for someone to take our order. They were out of all crab, which was a bummer.
Is this helpful?
T
Tony Gold
Seattle / Eastern Washington26 reviews
3.0
Dined on 3 July 2025
1. Overall 3
2. Food 3
3. Service 2
4. Ambience 3
Nothing special about this place, food is average and not good value for money. Don’t know what the cover charge of 5% is for as well as the 10% service charge 👎🏻
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M
Morgane
London1 review
2.0
Dined on 18 June 2025
1. Overall 2
2. Food 2
3. Service 3
4. Ambience 3
Too many food for the price... We ordered taste of KOYN and we were surprised to share everything (even de desert).
Is this helpful?

Dining areas

Additional information

Dining style
Fine Dining
Price
£41 and over
Cuisines
Japanese
Hours of Operation
Lunch Tue–Sat 12:00–14:30 Dinner Tue–Sat 17:30–22:30
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.
Delivery & takeout
Order direct

Location
38 Grosvenor St, London, Greater London W1K 4QX
Area
Mayfair
Cross Street
Grosvenor Square
Parking Details
Street Parking
Public transport
Nearest Tube Station is Bond Street (Davies Street and turn right on Grosvenor Street)
Additional
Gluten-free Options, Vegan

Permanently Closed

This restaurant is permanently closed.