Number overview
0800-888-6380 is a toll-free number (the 0800 prefix). It is reported as a nuisance call using an automated-voice survey disguised as an electricity-rate review.
Reported behavior
- Runs an automated-voice "survey on electricity rates"
- Collects information under the guise of a "utility-cost reduction diagnosis"
- After you answer, follow-up sales calls about solar panels and storage batteries arrive
Automated-voice phone solicitations like these may be aimed at harvesting personal information or building a sales list.
How to handle this call
Don't engage with the automated survey - just hang up. We recommend setting up call blocking.
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 business calling itself an electricity-rate survey center
- Telnavi: user reports classifying it as a sales call (nuisance score 90%)
Where to report or get help
- Consumer Hotline: 188
- Police consultation line: #9110