Kohaku
“Koji Koizumi folds truffle and caviar into strict kaiseki grammar and keeps three stars doing it. Book the counter, connoisseurs.”
About Kohaku
Koji Koizumi trained for years under Hideki Ishikawa a few lanes away, opened Kohaku, and in 2015 became Japan's youngest chef to hold three Michelin stars at thirty six. The 2026 guide keeps him there. In April 2024 the restaurant moved into new premises on Kagurazaka 3 chome, a few minutes from Iidabashi station, trading the old hideaway for a calmer, larger room without loosening the cooking. Dinner runs roughly ¥60,000 to ¥80,000 a head before drinks, the price of a hard ticket honestly stated.
Kohaku's argument is that kaiseki is a grammar, not a museum. Koizumi writes foreign words into it: black truffle shaved over a winter soup course, caviar set against rice, a spice route detour inside a course that still bows to the season. The comparison with his teacher is the point, Ishikawa the classicist and Koizumi the modernist, and Kagurazaka's stone lanes hold both within a five minute walk of each other, the densest three star neighborhood in Japan.
Getting in is the project. The counter sells out to regulars and agency allocations; TABLEALL and byFood hold seats for overseas guests at a markup, and hotel concierges still perform quiet miracles. The private rooms, which suit four to eight, are the realistic route for groups. Two three star kitchens inside one neighborhood makes a Kagurazaka evening the city's best fine dining walk, and Kohaku is the harder ticket of the pair, which tells you where the demand sits.
The Room
A wooden counter plus private rooms behind screens in the 2024 premises: stone entry, low lighting, the hush Kagurazaka does better than anywhere in Tokyo. Counter seats face the cutting board; rooms trade spectacle for privacy. Dress is smart, shoes come off for tatami seating, and fragrance should stay home out of respect for the dashi.
Why book it, occasion by occasion
Match the night to the room and the bill stops mattering. These occasions fit Kohaku best.
For the guest who finished the sushi circuit
Tokyo insiders know the counter here is scarcer than most three star tables, and a booked seat says more than any Ginza marquee. Courses arrive with brief explanations, western ingredients give visiting guests handholds, and the pacing leaves room to talk. Bring the client who has already done the famous counters; this is the next level of the syllabus, and they will know it.
For negotiations that need a closed door
The private rooms are the asset: four to eight seats behind screens, a fixed menu with no ordering friction, and staff who read silence correctly. Kaiseki's course rhythm builds natural checkpoints for a negotiation, and the final rice course lands the table at ease. Book the room rather than the counter, give the restaurant your timing constraints in advance, and they will hold them.
For the diner who tracks stars
A birthday here reads as ambition rather than routine, the counter a front row seat to a chef rewriting a tradition. The kitchen marks occasions with restraint, a seasonal sweet rather than a candle, and the room's hush makes the toast feel earned. For the person in your life who keeps a list of the world's hard tables, Kohaku is the one they have not crossed off.
What to order
The menu is the chef's, so the calls are the seat, the season and the glass.
- Counter over private room, if you can win it
The knife work and charcoal are the show, and Koizumi's counter is the scarcest seat in Kagurazaka. Groups take the rooms; pairs fight for the wood.
- A winter booking for the truffle soup
The black truffle over the owan course is the signature collision of the house. December to February bookings catch it at peak.
- The sake flight
The list leans small brewery junmai chosen against dashi. Let the staff pour; a flight beats bottle roulette on a menu you cannot see.
- The Kagurazaka walk after
The stone lanes outside are half the reason to book here rather than Ginza. Keep the hour after dinner free and walk them.
Practical
- Address
- Kagurazaka 3 chome, Shinjuku, Tokyo
- Reservations
- TABLEALL, byFood or hotel concierge · counter scarce
- Price
- About ¥60,000 to ¥80,000 before drinks
- Seats
- Counter plus private rooms for 4 to 8
- Dress
- Smart · no strong fragrance
- Dietary
- Allergies with notice · no vegetarian menu
- Access
- Iidabashi station, 3 minute walk
- Nearby
- Kagurazaka Ishikawa, the teacher's house
Questions diners ask
Is Kohaku worth it?
Yes, for diners who already know classical kaiseki. Three stars in the 2026 guide, a chef who reached three stars at thirty six, and a menu that bends tradition with truffle and caviar rather than breaking it. At ¥60,000 to ¥80,000 a head it prices above its teacher's house nearby, hence the Value six.
How do I book Kohaku?
Through an agency or a concierge in practice. TABLEALL and byFood carry allocations with service fees; top hotel desks can sometimes conjure the counter. Direct booking in Japanese exists but seats vanish to regulars. Plan two to three months out, and take a private room if the counter will not give.
Where is Kohaku now?
On Kagurazaka 3 chome in Shinjuku, in premises the restaurant moved into in April 2024, about three minutes from Iidabashi station. The stars moved with it: Michelin kept Kohaku at three through the relocation, and the new room added private capacity the old address never had.
What is the difference between Kohaku and Kagurazaka Ishikawa?
Teacher and student, classicist and modernist, five minutes apart. Hideki Ishikawa cooks strict seasonal kaiseki; his former deputy Koji Koizumi folds western luxury ingredients into the same grammar at Kohaku. Both hold three stars in 2026. Eat Ishikawa first for the baseline, Kohaku second for the argument.