Real Examples of Electricity & Gas Contract Problems for Foreigners (2026 Guide)
When moving to Japan, many foreigners focus on rent and internet — but overlook electricity and gas contracts.
Because Japan’s energy market is liberalized, you can choose from many providers, such as:
- TEPCO (Tokyo Electric Power Company)
- Kansai Electric Power
- Chubu Electric
- Tokyo Gas
- Osaka Gas
- Rakuten Denki
- ENEOS Denki
- Looop Denki
- au Denki
- SoftBank Denki
More choices mean more chances to make mistakes. This guide explains the most common utility contract mistakes in Japan, with real cost examples and practical solutions.
目次
1. Assuming the Real Estate Agent’s Recommended Company Is the Cheapest
When signing a rental contract, agents often say: “Let’s set up your electricity with this provider.” Common examples include ENEOS Denki, SoftBank Denki, and au Denki. However, recommended does not always mean cheapest.
Real Case (Tokyo, single worker):
Winter electricity bill with ENEOS Denki: ¥9,200
Friend using TEPCO (similar usage): ¥7,800
Difference: ¥1,400/month (≈ ¥16,800/year)
2. Believing “No Basic Fee” Always Means Cheaper (Rakuten Denki Example)
Rakuten Denki advertises “No basic monthly fee.” But electricity bills usually include a basic fee and a per-kWh usage fee. A higher per-kWh rate can make your bill higher—especially in summer and winter.
Real Case (Nagoya, couple):
Rakuten Denki (summer A/C month): ¥13,800
Chubu Electric (similar usage): ¥11,900
Difference: ¥1,900 in one month
3. Not Understanding Market-Linked Pricing (Looop Denki Risk)
Looop Denki uses market-based pricing. It can be very cheap when wholesale prices are low, but it can spike when prices rise.
Real Case (Osaka, foreign couple):
Normal month: ~¥8,000
High wholesale price month: ¥14,500
If you choose market-linked electricity, you must accept price volatility.
4. Overestimating Mobile + Electricity Bundle Discounts (au Denki Example)
Bundles like au Denki or SoftBank Denki may offer a smartphone discount (e.g., ¥500/month). However, electricity unit prices can be slightly higher.
Real Comparison (Tokyo office worker):
Annual total with TEPCO: ¥96,000
Annual total with au Denki (after discount): ¥101,000
Result: ¥5,000 higher per year
Tip: Always compare annual totals, not just monthly discounts.
5. Choosing the Wrong Ampere Contract (Common Beginner Mistake)
In many regions (e.g., TEPCO areas), your ampere level affects your basic monthly fee.
- 30A
- 40A
- 50A
Real Case (International student):
Signed 50A (family-level) by mistake.
30A: ~¥900/month vs 50A: ~¥1,500/month
Extra cost: ¥600/month (≈ ¥7,200/year)
6. Forgetting to Cancel Utility Contracts When Moving Out
Utilities are not automatically canceled, and gas contracts may require inspection. Cancellation dates must match move-out dates.
Real Case (Leaving Japan):
Move-out date: March 20
Utility cancellation: April 1
Result: Extra charges + possible visit fee
Tip: Schedule cancellation 1–2 weeks before moving.
7. Switching Gas Companies Without Real Savings
Gas price differences are often small. In some cases, the paperwork effort is not worth it.
Example: Annual savings after switching gas supplier: ~¥2,000
8. Monthly Cost Simulation (Single Household, 300 kWh Usage)
| Provider | Estimated Monthly Cost |
|---|---|
| TEPCO | ~¥8,000 |
| Rakuten Denki | ~¥8,300 |
| ENEOS Denki | ~¥7,900 |
| Looop Denki | ¥7,000–¥13,000 (variable) |
There is no universally cheapest provider. Costs depend on your usage, region, and contract type.
9. What Foreigners Often Overlook
- Cancellation fee
- Minimum contract period
- English customer support
- Payment method restrictions
- Post-campaign pricing
- Market-linked risk
10. How to Avoid Utility Contract Mistakes in Japan
- Check your estimated monthly kWh usage.
- Compare at least two providers.
- Calculate annual total cost.
- Confirm cancellation fee and contract term.
- Verify ampere level.
- Check English support availability.
Conclusion
Utilities are fixed expenses. A ¥1,000 difference per month equals ¥12,000 per year—and much more over time. Spending 10 minutes comparing contracts can save tens of thousands of yen.
For foreigners living in Japan, understanding electricity and gas contracts is one of the smartest ways to reduce living costs.
Related Articles (Save More Money in Japan)
Want to save even more money in Japan?
- https://jirojournal.com/how-to-save-money-living-in-japan/– practical ways to cut rent, food, and daily costs.
- https://jirojournal.com/cheap-sim-card-in-japan-2026-updated/ – compare the best budget SIM plans for foreigners.