Contact us
Retail electricity
Electricity supply services for homes
Homeowners / electrical contractors
SoftBank Denki customer center (only available in Japanese)
- Tel:
- 0800-170-3710
- Operator hours:
- 09:00 – 20:00 (Open 365 days)
Corporate customers
SoftBank Denki corporate customer center (only available in Japanese)
- Tel:
- 0800-888-8118
- Operator hours:
- 09:00 – 18:00
(Closed weekends, national holidays, and year end through New Year)
Low voltage purchasing service
Purchasing of electricity generated by customers
SB Power customer center (only available in Japanese)
- Tel:
- 0800-888-5533
- Operator hours:
- 09:00 – 18:00
(Closed weekends, national holidays, and year-end through New Year)
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Not currently accepting new applications
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Customer support for contracts below 50kw (low voltage)
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Customers with contracts of 50kw and above are requested to inquire through ‘Other inquiries’ below
Other inquiries
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We do our best to reply promptly to all inquiries, but due to a high volume of calls and e-mails, we may not always be able to respond as quickly as we would like.
Inquiries received on a weekend or national holiday will be answered on the following business day or later. Thank you for your understanding.
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For inquiries regarding SoftBank Denki contracts, please inquire through the
SoftBank Denki page.