Your electricity bill,
How much cheaper will it be?
Just by changing your power company, your electricity bill changes.
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Selected plan
Check not only the fees, but also the benefits, cancellation fees, and conditions.
Simple Octopus
TG Octopus Energy
Corporation
Simple design with a 0 yen base fee.
Pay as you go,
Clear and easy-to-start electricity plans.
Basic plan
Tokyo Gas Co., Ltd.
Save more when bundled with gas.
With a reliable, classic plan,
Safe even for first-time electricity switching.
Basic Denki B
CD Energy Direct
The standard plan for an average household.
From singles to families
A well-balanced pricing plan.
V Plan
ENEOS Power Co., Ltd.
Save money with cars and point linkage.
Combined with daily life services
A plan with expanding benefits.
S Plan
Idemitsu Kosan Co., Ltd.
Idemitsu Denki
Simple pay-as-you-go pricing for peace of mind.
Unique to a major energy company
A trusted plan.
Major electric company plans
Compare all together
Summary and Check of Major Electric Power Companies' Characteristics
| Octopus Energy | Tokyo Electric Power Company Energy Partner |
HTB Energy | CD Energy Direct |
|
|---|---|---|---|---|
| Service area | Nationwide (Okinawa and remote islands excluded Except) compatible with |
Nationwide (Okinawa and remote islands excluded Except) compatible with |
Nationwide (Okinawa and remote islands excluded Except) compatible with |
Centered around the Kanto region Unavailable in other regions |
| cancellation fee | No cancellation fee | Premium S/L, With the premium plan Cancellation fee applies |
If canceled within one year Subject to penalty fee * No cancellation fee in case of relocation |
No cancellation fee * "Single Denki", "Basic Denki" Family Denki, Point Denki While "Smart Denki" and "CD Green Denki" do not incur any cancellation fees at all, Some electricity plans incur cancellation fees. |
| Renewable energy compatibility | Simple Octopus around April 2026 or later effectively renewable energy Compatible with 100% |
With the Aqua Energy 100% renewable energy Compatible with 100% *From January 11, 2023 New applications temporarily suspended |
With the LOVE Earth Plan effectively renewable energy Compatible with 100% |
With CD Green Denki effectively renewable energy Compatible with 100% |
| To the official site | To the official page | To the official page | To the official site |
View notes, evaluation criteria, and sources
- Octopus Energy Official
・TEPCO Energy Partner Official
HTB Energy Official
- CD Energy Direct Official
Find an electricity company that suits you in 30 seconds
simulateFeatured by the editorial department
Introduce an electric power company
Summary of Major Electric Power Companies' Characteristics
Octopus Energy
Octopus EnergyThe pricing structure is simple and easy to understand.We are an electric utility. With Simple Octopus 2026-04, we supply electricity that is effectively 100% renewable energy.Simple plan with 0 yen base fee and no fuel cost adjustmentand it is a major feature that you can choose according to how you use electricity.
On the other handPay-as-you-go plan targeting the lowest pricesand other options are also available, making it easy to find a plan that suits you from among multiple pricing structures, which is another attractive feature.
With no cancellation fees or contract term commitments,It flexibly adapts to changes in lifestyle. With a good balance of rates, conditions, and environment, it is also chosen by those reviewing their electricity provider for the first time.
Tokyo Electric Power Company Energy Partner
TEPCO Energy Partner (TEPCO EP) is a major electric power company widely used primarily in the Kanto region, offering multiple rate plans tailored to various lifestyles and household usage patterns. A major feature is its diverse pricing structure, which includes plans tailored to different lifestyles, such as plans offering discounted rates at night or during specific time slots for all-electric homes, in addition to conventional standard plans. The pricing mechanism is clear, making it relatively easy to choose even for those reviewing their electricity provider for the first time. In addition, it is valued for its high reliability, offering ancillary services such as combined electricity and gas discounts and loyalty point programs.
To detail pageCD Energy Direct
CD Energy Direct is a combined electricity and gas contract.※This electric power company's major strength is its support for . Because utility costs can be managed together, it is favored by those looking to review their household budget. With a wide range of plan options, it offers pricing structures suited for everyone from single-person households to families. It features a well-balanced design between basic and usage rates, making it easy to experience savings based on consumption. Furthermore, with online application discounts and campaigns, it is chosen by people seeking comprehensive benefits beyond just pricing. Another appealing aspect is the peace of mind and stability provided by being operated by a major energy corporate group.
*Limited to cases where the electricity and gas supply contracts for the applicable plan are concluded under the same name at the demand location for the applicable plan, and the charges for the applicable electricity and gas plans are paid using the same payment method.
*The gas set discount applies to the basic fee and electricity volume charges (excluding the fuel cost adjustment). However, the gas set discount does not apply to Smart Denki. The electricity set discount does not apply to Yukapoka Gas and Hatsuden Gas.
ENEOS Denki
ENEOS Electricity is an electric power service whose strengths are a stable supply system and a sense of reliability backed by a major energy company. Its pricing structure is based on a standard metered-rate system, with the distinctive feature of linking benefits with gas stations and car life-related services. It is designed to be used advantageously in combination with everyday lifestyle services. It features a support system and service network unique to a major brand, making it suitable for those who prioritize peace of mind. It can be said to be an option for people who want to consider benefits across their entire lifestyle, not just electricity rates.
To detail pageElectricity company that won't fail
Selection Guide
From pricing and contract terms to compatibility with your lifestyle,
Easy-to-understand explanation of key points to avoid regret.
Find an electricity company that suits you in 30 seconds
simulateApplication process for an electricity company
Process from Application to Start of Use
STEP 01
Enter electricity usage
You enter your current power company and your monthly electricity bill.
Based on the information provided, we will estimate your annual electricity consumption and calculate the optimal plan.
STEP 02
Compare and check plans
You can compare estimated electricity bills and savings based on the simulation results.
Please check not only the rates, but also the contract terms, power source composition, and the features of each plan.
STEP 03
Apply for the plan you are interested in
Please check the details, and if you find an electric company you are interested in, you can apply directly.
If you are switching, having your supply point identification number or your previous electricity company customer number ready will make the process smoother.
STEP 04
Start of electricity service
After the switching procedure is completed, the new electricity company's service will start from the meter-reading date onwards.
As a general rule, construction work and attendance are not required.
When switching power companies
Frequently Asked Questions
Questions about contracts, fees, and procedures
You can check them all together.
Q.Does switching electric power companies make blackouts more likely?
A.No, it won't make power outages more likely.
Power transmission and distribution facilities are managed by regional electric power companies as before, so the quality and stability of electricity do not change even if you switch power companies.
Q.Are construction work or home visits required to switch power companies?
A.As a general rule, construction work and attendance are not required.
If the same type of power meter (smart meter) as the current one is already installed, the process is completed simply through remote switching procedures. Unless there are special equipment changes, there will be no power outages or on-site visits.
Q.Do I need to contact my current electricity provider to cancel my contract?
A.Basically, no cancellation notice is required.
When you apply for a new electricity company, the cancellation process with your current electricity company will be done automatically.
*However, please check in advance if your contract plan involves cancellation fees.
Q.Will the electricity bill really go down?
A.Depending on your household's usage and contract plan, choosing a plan that fits your usage situation may lead to savings.
Particularly households with high electricity consumption and those who can take advantage of time-of-use pricing tend to see more benefits.
I recommend comparing them with reference to the simulation results.
Q.Does the electricity company switch immediately after signing the contract?
A.Switching will, as a rule, take place from the next meter-reading date onward.
Therefore, it does not switch immediately after application, but the supply from the new power company usually starts within a month as a guide.
Find an electricity company that suits you in 30 seconds
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