KOYN is a modern Japanese restaurant founded by LSL Capital, the restaurant group from father-daughter duo Samyukta and Dinesh Nair that also lays claim to Michelin-starred Jamavar, MiMi Mei Fair, Bombay Bustle and Socca. Its aim is to balance ancient Japanese tradition with modernity in order to create a unique, two-fold dining experience.
The two-story space is located just off Mayfair’s Grosvenor Square in what was formerly the US embassy. Two distinct areas of the restaurant, Midori and Magma, have been designed to reflect the two forces at play in Mount Fuji, the former representing vegetative life above and the latter an active, bubbling volcano beneath. Midori on the ground floor offers décor inspired by a Japanese garden, with plush green banquettes, iridescent shell walls, a bronze leaf mirror and a centrepiece marble sushi bar. From here, guests can order lobster tempura sushi rolls and Applewood smoked Japanese A5 Kagoshima wagyu sushi roll with asparagus, kanpyo and black truffle.
Contrastingly, Magma on the ground floor is an immersive subterranean space housed beneath black oak ceilings. The focal point is the traditional binchotan-charcoal-fuelled robata grill, crafted from black slatted timber and rainforest marble and lined with burnt orange leather stools, from which guests are close enough to feel the heat of the flames.
The kitchen is led by ex-Nobu chef Rhys Cattermoul who showcases the broad spectrum of Japanese cuisine through umami flavours and locally soured produce. Alongside specialist dishes for the sushi bar and robata grill, Cattermoul has created signature dishes such as steamed clams with cordycep mushrooms, yuzu sake soy, spinach and samphire, as well as red mullet tempura with yuzu kosho tozazu with homemade kombu salt. Dishes off the grill, meanwhile, include hojicha-smoked lamb marinated with spicy kuromame miso and hispi cabbage, as well as wagyu ishiyaki served on a sizzling hot stone with yakiniku sauce.