Release rule
How to Book Ishimaru: Reservation Release Day, Phone and Rules (2026)
いしまる · Omiya, Saitama · Sushi · Lunch & dinner
How to book this house
TableCheck or Ikyu online, or phone in Japanese (048-871-7244) and Instagram DM; six or more by phone. No release day, but the eight-seat counter fills more than a month ahead.
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Dinner Mon–Sat from 18:00, Saturday lunch 13:00 (book by that week's Friday); closed Sundays.
- Next release
- No release day — book any time
- Where bookings are taken
- Platform · TableCheck, IkyuTableCheckIkyu
- Lunch / dinner
- Lunch & dinner
- Phone line
- 048-871-7244 (also Instagram DM)
- The house's cancellation charge
- From 00:00 JST, 1 day before100%
- Same day, with notice100%
- Same day, no notice (no-show)100%
Charged by the house, not by us. A plan's own policy takes precedence.
Source: TableCheck, read 2026-10-04
- If a seat comes back
TableCheck has no vacancy alert for future dates; its emails are about your own booking, and a same-day queue exists only where the restaurant turns it on. support-diners.tablecheck.com
About this house
Eight-seat self-taught Edomae counter, The Tabelog Award Bronze; Saturday 13:00 single-start lunch is the easier seat.
Allergies or dietary needs? Make a Japanese dining card →
Next release days
No release day — book any time
Last verified September 7, 2026 · checked by our desk October 4, 2026
Source for the booking rule: the booking page (tablecheck.com), read September 7, 2026.
All times are Japan Standard Time (UTC+9).
When does Ishimaru open its reservation book?
TableCheck or Ikyu online, or phone in Japanese (048-871-7244) and Instagram DM; six or more by phone. No release day, but the eight-seat counter fills more than a month ahead. Dinner Mon–Sat from 18:00, Saturday lunch 13:00 (book by that week's Friday); closed Sundays. All times are Japan Standard Time (UTC+9).
What does Ishimaru charge if you cancel?
From 00:00 JST, 1 day before 100% / Same day, with notice 100% / Same day, no notice (no-show) 100%. Charged by the house, not by us. A plan's own policy takes precedence. Source: TableCheck, read 2026-10-04
How do I book Ishimaru from abroad?
Ishimaru takes reservations online through TableCheck and Ikyu, which you can use from abroad with your own account and a credit card. If you would rather not, our Tokyo desk can request it for you: ¥12,000 per seat, charged only if the table is secured. A free release-date alert emails you the day before, on the morning of release day (08:00 JST) and about 30 minutes before when the opening time is known; houses that open a little every day come in a weekly summary.
What time zone is the release time?
All times are Japan Standard Time (UTC+9). Release days are computed from the house's published rule and re-checked monthly.
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← All 1,504 houses in the booking calendar
Rules are verified against official notices and platform listings and re-checked monthly. Houses change their systems without warning; treat the calendar as a planning tool. For restaurants in our collection, our desk confirms the specifics for your dates when you request.