38 Grosvenor Street, London W1K 4QA
This comes from Samyukta Nair, the restaurateur behind hits like Jamavar and Mimi Mei Fair. This time, there are two restaurants in one. Upstairs, it's all about Japanese food including sushi and a robata grill. Downstairs you'll find Koyn Thai, a high-end Thai restaurant with a fair bit of fire used in the cooking.