Number overview
03-6626-2546 is used by Mizuho Bank as the sender of SMS notifying customers that their paper-based direct-debit registration has been completed. We confirmed that Mizuho Bank's official FAQ explicitly states that completion notices are sent by SMS from 03-6626-2546 (as of 2026-08-03).
This site previously described the number as a fraud number sending fake Mizuho SMS. Re-verification against the official FAQ confirmed it is a legitimate sender, so we corrected the page.
What the SMS is
- Completion notices for direct-debit registrations submitted by paper form
Care when you receive bank SMS
SMS in a bank's name can be either genuine notices or phishing. If unsure, do not open links in the SMS; log in directly via Mizuho Bank's official app or website instead. Suspect fraud if an SMS asks you to enter a PIN or one-time password.
Where to report or get help
- Consumer Hotline: 188
- Police consultation line: #9110
- Ministry of Internal Affairs and Communications - Telecommunications Consumer Consultation Center: 03-5253-5900