Tobi Masa

Grosvenor Square and the Architecture of Arrival

The former US Embassy at 30 Grosvenor Square spent decades as one of the most recognisable modernist facades in central London. Eero Saarinen's 1960 building — clean Portland stone, a gilded eagle above the entrance, a formal square address in the heart of Mayfair — was designed to project authority. When Rosewood converted it into The Chancery Rosewood hotel, the architectural brief was preservation: keep the bones, refit the interior. The result is a dining room that carries genuine spatial weight before anyone sits down. For London hotels with serious in-house restaurant programmes, the address places Tobi Masa in a distinct competitive tier. See our full London restaurants guide for how it maps to the broader scene.

Hotel-anchored Japanese restaurants at this level in London tend to occupy one of two formats: stand-alone omakase counters that happen to be housed within a hotel, or full-service Japanese dining rooms that use the hotel footprint to offer both counter and table experiences. Tobi Masa is firmly the latter. The sushi counter seats guests for omakase, while the wider room runs an extensive contemporary Japanese menu. That dual-format approach is less common in London than in Tokyo or New York, and it gives the space a different rhythm from single-format omakase rooms.

Masa Takayama in London: What the Lineage Signals

New York's top-tier Japanese dining has long been benchmarked against Masa at the Time Warner Center, where Masa Takayama established a counter widely cited as one of the most expensive restaurants in the United States. That reputation, built over more than two decades in New York and before that in Los Angeles and Japan, carries specific meaning when a chef opens abroad. London's Japanese dining scene has matured considerably over the past decade , The Ledbury and CORE by Clare Smyth anchor the fine dining end, while more recent openings from Ikoyi and The Clove Club show how the city absorbs globally-sourced culinary influence , but a Masa Takayama outpost is a different kind of signal. It suggests the city has reached the density and spending power that makes a second address viable for a chef whose original venue trades on scarcity.

That scarcity logic matters for how Tobi Masa positions itself. Le Bernardin in New York City is a useful comparison point: a restaurant closely identified with a single chef whose name carries global weight but whose London or international presence would reframe the original's cachet. The question for any chef-branded second address is whether the satellite operation carries forward the discipline of the original, or becomes a looser interpretation. At Tobi Masa, the signature toro with caviar , a dish whose ingredient logic traces directly to the premium sourcing philosophy of the New York counter , suggests the ingredient standards travel with the name.

The Japanese List in a Mayfair Context

The editorial angle on Tobi Masa's drinks programme matters specifically because of where it sits. Mayfair's restaurant addresses , Alain Ducasse at The Dorchester included , operate in a neighbourhood where the wine list is part of the room's value signal, not merely a supplement to food. Japanese fine dining, particularly at omakase level, has historically sat in a complicated relationship with wine: sake-first programmes were common for much of the 2000s, but the top-end counters in New York and Tokyo have progressively built wine lists that compete seriously with comparable Western fine dining rooms.

For a Mayfair opening anchored in hotel infrastructure, the expectation is a cellar that speaks to both the Japanese menu and the address. Rosewood's hotel operations globally have tended toward serious beverage programmes , a pattern visible in their other properties , and that track record informs what a guest should expect here. The dual-format menu (counter omakase plus full table service) creates an interesting curation challenge: sake pairing for the counter, a broader list capable of running alongside contemporary Japanese dishes for the wider room. A list that handles both with depth, rather than defaulting to a generic international selection, is the marker of a programme that takes the format seriously.

London's broader drinks scene has moved in a direction that rewards this kind of specificity. For those wanting to extend the evening, our full London bars guide covers the Mayfair options. Our full London wineries guide and full London experiences guide round out the broader picture.

Where Tobi Masa Sits in London's Japanese Dining Tier

London's omakase counter scene has grown noticeably since 2019. The format , fixed seat count, chef-led progression, premium sourcing , now has multiple serious practitioners across zones 1 and 2, and the tier occupied by Tobi Masa sits at the upper end of that range, priced and positioned against comparisons in New York, Paris, and Tokyo rather than against mid-market London Japanese restaurants. That peer-set positioning is deliberate: the Rosewood address, the Saarinen architecture, and the Takayama name collectively bracket the experience away from the broader London Japanese market.

For context on how this fits into London's wider fine dining picture, the comparison set includes restaurants like those listed in our London restaurant guide. Beyond London, those tracking the chef-driven end of UK dining should also look at Waterside Inn in Bray, Moor Hall in Aughton, L'Enclume in Cartmel, Gidleigh Park in Chagford, Hand and Flowers in Marlow, and hide and fox in Saltwood for the depth of the UK's current fine dining position. And for a transatlantic reference point, Emeril's in New Orleans illustrates how chef-brand expansion beyond a flagship can work when the original's standards are clearly transmitted.

Know Before You Go

• Address: The Chancery Rosewood Hotel, 30 Grosvenor Square, Mayfair, London
• Format: Sushi counter (omakase) and full table service (contemporary Japanese menu)
• Signature: Toro with caviar
• Booking: Contact The Chancery Rosewood directly; counter seats at omakase level should be treated as advance-booking only
• Setting: Eero Saarinen's 1960 modernist building, preserved as part of the Rosewood hotel conversion
• Neighbourhood: Mayfair, Grosvenor Square , served by Bond Street (Central/Jubilee) and Marble Arch (Central) Underground stations