Number overview
050-3107-5405 is a number with many user reports describing automated-voice calls presenting themselves as election or cabinet-approval surveys (as of 2026-08-03). Reports describe an opener of "We are calling at random" followed by a prompt to enter your postal code. Calls are reported from across Japan.
Reported tactics
- Reports of an automated voice announcing, "This is an election survey. We are calling at random"
- Reports of prompts to enter your postal code via the keypad
- Reports of follow-up questions about preferred party or cabinet approval
- Calls are reported from across the country
Legitimate opinion surveys normally identify the conducting organization (newspaper, broadcaster, research firm). Don't respond to automated-voice surveys whose sponsor is unclear.
How to handle this call
Don't enter personal information
Don't enter identifying information such as your postal code or phone number on the keypad. Just hang up.
Block the number
Add 050-3107-5405 to your block list to prevent further calls.
Sources of the reports
The descriptions on this page are based on user reports posted to third-party phone-number directories (checked as of 2026-08-03). This site has not independently verified the caller, and nothing here identifies the caller definitively. The reporting sources we checked are:
- jpnumber: registered as a nuisance automated-voice survey
- Telnavi: user reports describing opinion-poll and party-support survey calls (144 users, 77 reviews)
- Number-lookup articles via Hatena Bookmark: reports of automated surveys in the name of an "opinion research center" (May 2026)
- X and Threads: posts describing cabinet-approval surveys prompting for postal-code input
Where to report or get help
- Consumer Hotline: 188