Quick answer: OMAKASE by GMO (omakase.in) — the reservation platform used by many of Japan's hardest-to-book restaurants — requires phone verification with a 4-digit SMS code during member registration, and the step requires a Japanese mobile number. This single step blocks most overseas diners before they can request a single seat.
What Is OMAKASE by GMO?
OMAKASE (omakase.in) is a reservation platform for high-demand restaurants in Japan — sushi counters, kaiseki and other chef-led establishments. Many listed restaurants release seats only through the platform, often with seat-release notifications that members can follow. Note the name: this is the OMAKASE platform at omakase.in, not the general Japanese word for chef's-choice dining.
How OMAKASE Phone Verification Works
- During member registration, OMAKASE asks for a mobile phone number.
- After you confirm the number, a 4-digit confirmation code is sent by SMS — normally within about 60 seconds.
- Entering the code completes the phone-verification step; registration then continues to payment details.
- Japanese mobile number required — overseas numbers do not complete this step.
- Landlines cannot receive the code — OMAKASE states the SMS cannot be sent to fixed-line numbers.
- Code delivery is quick — if nothing arrives within about 60 seconds, the number should be re-checked and the code re-sent.
If the SMS Code Doesn't Arrive
OMAKASE's help pages cover the common failure causes:
- The code is only sent after you press the confirmation button — it is not automatic on entering the number.
- Check the country code and phone number format. OMAKASE's help documentation identifies incorrect country-code selection as a possible cause of verification failure — make sure the selected code matches the number you entered.
- SoftBank users: the SMS sender shows as "22885" — that is not the code; the 4-digit code is inside the message.
- Wait 60 seconds, then re-send — if nothing arrives, re-check the number and request the code again; persistent failures go to OMAKASE's support form with the number you tried.
- Carrier changes can affect the account — OMAKASE has dedicated help articles for users on ahamo/LINEMO/povo plans and for those who changed carriers.
What Else Registration Involves
Phone verification is the hard gate for overseas users, but OMAKASE registration also involves the usual details of a high-end reservation platform: accurate member information, a credit card for booking and cancellation policies, and per-booking service fees. Restaurants receive registrant information for reservation management, and some may ask for ID at the door — so register with information that matches the diner.
Options for Overseas Diners
- A contact in Japan — ties the account to their number permanently.
- A Japanese SIM — works with an active Japanese mobile contract, usually requiring residency.
- A dedicated verification service — a Japanese mobile number receives the 4-digit code for your registration. See our OMAKASE phone verification service.
FAQ
Does OMAKASE use SMS or a voice call?
SMS. A 4-digit confirmation code is sent by text; there is no voice-call step in the standard registration flow.
Can I use my own country's phone number?
No — the verification requires a Japanese mobile number, which is exactly where overseas diners get blocked.
Is this the same as booking through a hotel concierge?
No. A concierge books on your behalf; an OMAKASE member account lets you follow seat releases and request reservations yourself.
Does completing phone verification guarantee a reservation?
No. It completes registration; seat availability, waitlists and booking decisions are controlled by OMAKASE and the restaurants.
Last checked: October 2026.