The Kitchen
Hamo — pike conger — is laced with fine, hair-thin bones that cannot be pulled, so it has to be cut: roughly two dozen slits per inch, the blade stopping just short of the skin. Koji Koizumi does it by hand, course after course, and the fish eats like clean white meat rather than a mouthful of needles. He took three Michelin stars at thirty-six, the youngest chef in Japan to do it, and has held them every year since 2016 from a small house on Kagurazaka's flagstone alley.
Koizumi trained in classical kaiseki and then bent it: butter, chilli paste, star anise, foie gras and truffle turn up where a purist would never put them, but always in service of the Japanese line rather than against it. There is no written menu — he builds the omakase around what is at its peak that week. The anago gohan (conger-eel steamed rice) and the snow-crab dumpling are the dishes regulars return for, and the daily dashi under everything is the foundation he adjusts by the season. The room seats only a handful at 3-4 Kagurazaka, Shinjuku, and feels like a private house. The omakase runs about ¥45,000 a head, ¥65,000 in a private room; booking usually needs an introduction and two to four months' notice.
The Room
Kohaku occupies a small house on Kagurazaka's flagstone alley — the most intact pocket of old Tokyo in the modern city — and the dining room reads like a private residence: a short counter and a few quiet tables, low light, no noise. Dress smart. The walk in past lantern-lit stone at night is part of the meal, and the screened intimacy means conversation never competes with the room.
Best for a Proposal
Book Kohaku for a proposal because the room is private-house intimate, the alley approach is pure old Tokyo, and the kaiseki's restraint leaves space between courses for the moment to land. Mention the occasion at booking — the team handles it discreetly. It is equally the table to impress a client who already knows the three-star circuit. More options in the Tokyo dining guide.
Not For
Not for a quick or casual dinner, or anyone who needs to choose à la carte — it is a long, set omakase at three-star prices, usually requiring an introduction and months of lead time.
Frequently Asked Questions
Is Kohaku worth it?
Yes, if you want three-star kaiseki with a point of view. Koji Koizumi has held three Michelin stars every year since 2016 and works classical technique — hand-cut hamo, daily dashi — while folding in butter, truffle and foie gras where they earn their place. At roughly ¥45,000 it is a serious outlay, but the craft is real and the room is tiny.
How hard is it to book Kohaku?
Hard. The house seats only a handful, and reservations generally require an introduction from an existing guest, hotel concierge or booking service, with two to four months' lead. There is no walk-in. If you can secure a slot, confirm any occasion and dietary needs at booking — the kitchen tailors the omakase to the night.
What should I order at Kohaku?
There is no à la carte — you take Koizumi's omakase, so the kitchen decides. Look for the hand-cut hamo (pike conger), the anago gohan (conger-eel steamed rice) and the snow-crab dumpling, with seasonal courses around them. Trust the dashi-based soup course; it is where the restraint shows clearest. Pair with sake from the house list.
How much does Kohaku cost?
The omakase runs about ¥45,000 per person, rising to roughly ¥65,000 for a private room (a booking fee can apply). With sake or wine pairings, a couple should plan well above ¥100,000 for the evening. It is among Tokyo's pricier kaiseki rooms, in line with its three Michelin stars.
Is Kohaku good for a proposal?
It is one of the best in Tokyo for it. The private-house room is intimate, the Kagurazaka alley sets the scene, and the unhurried kaiseki leaves natural pauses for the moment. Tell the team in advance and they will handle it discreetly. Just plan the booking months ahead, because dates are limited.