How to Fix SoftBank Energy (Denki) Troubles: A Survival Guide for Expats in Tokyo

暮らしのトラブル
2026.02.07

Are you having trouble with SoftBank Energy (SoftBank Denki)?

Living in Tokyo is amazing, but dealing with Japanese utility companies can be stressful, especially when language is a barrier. Whether you’re facing high bills, payment issues, or technical glitches, this guide will help you navigate the situation in plain English.

1. Common Issues with SoftBank Energy

Most international residents in Japan face these three main problems:

• High Billing: Why is my bill higher than last month?

• Payment Failures: My credit card was rejected, or I lost my convenience store payment slip.

• My SoftBank App Errors: I can’t log in to see my usage.

2. How to Contact Support (The “Language Gap” Solution)

SoftBank Energy’s main support is primarily in Japanese. If you don’t speak Japanese, here is the best way to handle it:

• Phone Support: Call 0800-170-3710 (Toll-free).

• Tip: If you cannot speak Japanese, use a translation app or ask a Japanese-speaking friend to help you. Say: “Eigo no tantousha wa imasu ka?” (Is there an English speaker?)

3. Key Vocabulary You Need to Know

When looking at your bill or dashboard, look for these keywords:

• Electricity Bill: 電気代 (Denki-dai)

• Usage Amount: 使用量 (Shiyou-ryou)

• Payment Method: 支払い方法 (Shiharai-houhou)

• Cancellation Fee: 解約金 (Kaiyaku-kin)

4. Moving or Cancelling?

If you are moving within Tokyo or leaving Japan, you must notify them at least 7 to 10 days in advance. You can usually do this via the “My SoftBank” portal.

Japanese Version of this article:

Troubleshooting SoftBank Energy (Japanese)

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Disclaimer:

This article is based on the author’s personal experience and information available as of February 2026. While we strive to provide accurate information, please note that SoftBank Energy’s policies, contact numbers, and procedures may change. For official support and critical issues regarding your electricity contract, we recommend contacting SoftBank Energy’s official customer support directly. Life Hacks Tokyo is not responsible for any issues arising from the use of this information.

この記事は2026年2月時点の情報に基づいています。正確を期していますが、ソフトバンクでんきの方針や番号は変更される場合があります。公式なサポートや契約に関する重要な問題については、公式カスタマーサポートに直接連絡することをお勧めします。当サイトは、この情報の利用により生じた問題について責任を負いません。

Quick Answer

If your electricity suddenly stops, do not assume it is a SoftBank Denki billing problem right away. First, check whether your neighborhood is also affected, then check your breaker, and only after that look into unpaid bills or contract issues. SoftBank’s official FAQ explains that if payment is not confirmed by the deadline shown on the warning postcard, the contract may be canceled and the electricity supply may stop.

Last checked: April 20, 2026

Official pages worth checking first

A simple way to narrow down the problem

  1. Check if nearby homes or street lights are also out
  2. Check your breaker and recent electricity usage
  3. Check unpaid notices, postcards, and your member page
  4. Contact the right side: grid company for outages, SoftBank for billing or contract issues

This saves time and reduces panic. Utility stress is bad enough without calling the wrong desk first.

Moving out or moving within Japan

If you are moving, SoftBank provides online procedures through member pages for certain moving-related cases. If you already know your moving date, do not wait until the last minute. The earlier you handle this, the less likely you are to end up with billing confusion or a service gap.

Moving-related FAQ
https://www.softbank.jp/support/faq/view/18211

FAQ

Q1. Will SoftBank Denki stop electricity immediately if I miss one payment?

The official FAQ explains that a warning notice is sent first, and if payment is not confirmed by the deadline shown on that notice, the contract may be canceled and supply may stop.

Q2. Can I re-contract with SoftBank Denki after cancellation?

According to the official FAQ, if the contract is canceled due to this process, re-contracting with SoftBank Denki may not be possible. In that case, you may need to contact your local power company.

Q3. What if the issue is a local outage, not my contract?

Check TEPCO’s outage information page first. If the area is affected, the problem may be with the grid rather than your individual contract.

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Final Note

This guide is here to help you stay calm and sort the issue faster. For any contract-critical or urgent case, always confirm with the official support pages above. Guessing is expensive when electricity is involved.

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