Practical Guide to Cutting Utility Costs by ¥30,000 Annually in Your Rental Home

Why Utility Costs Tend to Be Higher in Rental Homes

Rental properties differ from owner-occupied homes in that insulation performance and equipment options are often limited, creating a structure that naturally leads to higher utility costs. In older buildings, windows have poor sealing, reducing air conditioning efficiency. Equipment placement—such as the location of the gas water heater or washing machine area—also affects water and gas consumption.

Precisely because of these property limitations, a two-pronged approach—reviewing your service provider contracts and improving lifestyle habits—is especially effective for rental residents. There are many practical methods you can implement without major renovations.

Save ¥10,000–30,000 Annually by Switching to Alternative Energy Providers

Since the full liberalization of retail electricity sales in 2016, you can freely choose your power company. Switching to alternative energy providers ("new electricity" companies) is possible in most rental homes without requiring permission from the management company or landlord. Power contracts are made directly between the resident and the electricity company, with no changes to building infrastructure.

However, be aware of these exceptions:

• •Properties with bulk electricity purchasing: If the entire building purchases electricity collectively, individual alternative provider contracts are generally not possible. Check your move-in contract and building bylaws.
• •Properties where common and private electrical systems are integrated: Rare cases exist where the power meter is shared.

The switching process generally follows these steps:

1. Compare providers using comparison sites (such as Ene Change) based on your current usage
2. Choose a plan and apply through the alternative provider's website
3. You typically don't need to contact your old provider directly—the new company usually handles cancellation
4. After the smart meter is installed (at no cost), your switch is complete

Expected savings are roughly ¥5,000–12,000 annually for a single person (using ~30–40 kWh monthly) and ¥15,000–30,000 annually for a family (using ~300–500 kWh monthly). Since savings vary by plan, always confirm with a simulation before switching.

Gas in urban areas has been liberalized since 2017 and can similarly be switched. Many providers offer additional discounts when bundling electricity and gas contracts.

When to Confirm with Your Management Company and Important Considerations

While switching providers is generally free, it's wise to check with your management company or landlord first in these situations:

• •Propane (LPG) buildings: LPG is not covered by deregulation, so you cannot change providers. Make a habit of checking the gas type (city gas or propane) when apartment hunting. Propane tends to be more expensive than city gas.
• •All-electric buildings: While power plan options are abundant, these buildings are typically designed to leverage discounted nighttime rates, so carefully review pricing structures when switching plans.
• •When shared equipment is suspected: If your contract is unclear, it's best to ask the management company.

When moving, you'll need to handle procedures at both your old and new addresses. Plan the timing of your switch around your move-in and move-out dates, including any final settlements or deposit considerations.

Savings You Can Achieve Through Lifestyle Changes

Alongside contract changes, you can further reduce utility costs by improving daily habits.

Shorter Showers (Gas and Water)

A typical shower uses 10–12 liters of water per minute, consuming corresponding amounts of gas. Shortening your daily shower by just 1–2 minutes can save several hundred yen monthly on combined water and gas bills—potentially ¥3,000–5,000 annually. Switching to a water-saving showerhead (which may require management approval) is also effective; for rentals, choose removable models.

Do Laundry in Batches (Electricity and Water)

Running your washer 2–3 times a week in full loads is more efficient than daily small loads. A single wash uses 50–100+ liters of water even in water-saving machines. Dryer functions consume significant electricity, so air-drying on sunny days alone can reduce your electric bill by ¥500–1,000 monthly.

Air Conditioning Temperature Management (Electricity)

The Ministry of the Environment recommends 28°C in summer and 20°C in winter. Raising your summer setting by 1°C or lowering your winter setting by 1°C can reduce power consumption by roughly 10%. Regular filter cleaning (about once a month) is highly effective for maintaining efficiency—studies show that a dirty filter increases consumption by 10–15%. Using curtains to block sunlight in summer and retain heat in winter is also helpful.

By Household Type: Savings Goals and Implementation Priorities

For Single-Person Households

Average monthly utility costs for single residents are roughly ¥5,000–8,000 for electricity, ¥2,000–4,000 for gas, and ¥2,000–3,000 for water (monthly average of bimonthly charges). A realistic annual savings target is ¥10,000–15,000.

Implementation priority:

1. Switch to an alternative provider (minimal effort, major savings)
2. Clean AC filters regularly and optimize temperature settings
3. Shorten shower duration

For Family Households

Monthly utility costs for families (3–4 people) often reach ¥10,000–20,000 for electricity, ¥5,000–8,000 for gas, and ¥4,000–6,000 for water. An annual savings target of ¥20,000–30,000 or more is achievable.

Implementation priority:

1. Switch electricity and gas together (greater impact with higher household consumption)
2. Consolidate laundry loads and reconsider dryer use
3. Reduce shower time across all family members (multiplied savings)
4. Adjust refrigerator temperature settings (medium in summer, low in winter)

Summary: Utility Cost Reduction Is Achievable Even in Rentals

Many people assume that rentals can't be optimized because "equipment can't be changed," and thus neglect utility cost reviews. However, switching to alternative providers is possible in most rentals, and combining this with lifestyle improvements makes saving ¥10,000–30,000 annually entirely achievable.

Even at the apartment-hunting stage, simply confirming "city gas or propane" and "bulk purchasing or not" can significantly affect your future utility cost control. If you're already renting, we recommend trying an electricity provider switch simulation right away. Small consistent actions will substantially improve your rental living budget.