An Easy Japanese Air Conditioner Guide: How-To Care & Clean

Proper AC maintenance can cut your electricity bills by 15-25% and extend your unit's life from 8 to 12+ years.

Here's what to know about how to care for and clean your Japanese air conditioner so that it will keep working properly throughout humid summers and freezing winters. 

Does Japan have air conditioning?

Wall-mounted air conditioners are common in Japan

Yes, Japan does have air conditioning.

While central heating and air conditioning are common in some Japanese buildings, wall-unit air conditioners are more common.

Japanese air conditioner installation

When searching for an apartment, an akiya house, or any other property in Japan, you may find that it doesn't come with a pre-installed Japanese air conditioner.

In such cases, you'll need to purchase and install your own unit(s). Air conditioners can be bought at department stores, many of which offer discounts and point incentives if you purchase two or more units with installation included.

Be sure to consider the size of the room where each unit will be installed. Generally, the larger the AC unit, the more effective it will be at cooling or heating a larger space.

If you just bought a property in Japan and need help setting up your utilities, wifi, and AC installation, let MailMate bilingual property management services handle the work for you. 

MailMate's services prepare your property for your move by contacting utility companies and installation services on your behalf!

Japanese air conditioner remote control guide

If you don't read Japanese, the air conditioner remote might appear daunting at first glance. Below is a picture-based guide, explaining each of the buttons on your AC remote.

Translated エアコン remote buttons. Image from Japan Mobility

Once you know what each button means, using the Japanese air conditioner remote is just like using any other remote controller for the AC unit. 

Here is a translated guide:

Money-saving remote settings

Interested in keeping your electricity bill down without sacrificing comfort?

Here are some tips to keep in mind:

Summer optimization (June-September):

• Temperature: 26-28°C (each degree lower increases costs 10%)

• Mode: AUTO or ECO

• Fan: AUTO speed

Winter optimization (December-March):

• Temperature: 18-20°C (each degree higher increases costs 10%)

• Mode: AUTO

• Use 内部クリーン after each session

How to clean your air conditioner in Japan

If you've been using your air conditioner in Japan for a while now, it might be time for a cleaning.

While you can call a professional, cleaning the AC yourself is relatively easy.

Step 1: Buy an AC cleaner spray

Search for エアコン洗浄スプレー online or at drugstores in Japan. For unscented smells, look for this kanji: 無香性.

Step 2: Unplug your AC

For safety reasons, turn off and unplug your AC from its socket. 

Step 3: Open your AC unit 

Most AC units can be easily accessed without tools. Pull the tabs at the end up, and the whole cover will open.

Step 4 Remove and clean the filter

Depending on the size of your AC, you will have one or two dust filters. Remove those by pulling up and slightly toggling them so they come loose. 

Once removed, clean the filters. You can do so by washing and drying them in your bath unit. 

Step 5: Apply the cleaner

Follow the instructions on the AC unit cleaner.

Generally, you hold the spray about 5 cm away from the air conditioner and spray liberally. 

Wait 10 minutes, and then you are good to go.

Step 6: Reassemble the AC

Place your air filters back inside your AC unit, plug it back in, and congratulations! You've cleaned your Japanese AC unit.

While a yearly cleaning is sufficient for general maintenance, it's a good idea to clean your AC filters before both the summer heat and the winter cold to ensure the unit operates efficiently.

Your AC's money-saving maintenance schedule

Reduce your electricity bill by cleaning your AC before each season begins. Here are some example estimated savings you can expect:

Spring preparation (March-April)

Time Investment: 30 minutes Potential Savings: ¥15,000 over summer

• Deep clean filters and internal components

• Test all remote functions

• Check for winter damage or leaks

• Schedule professional inspection if unit is 5+ years old

Pre-summer deep clean (May)

Time Investment: 45 minutes Potential Savings: ¥20,000 over summer

• Complete cleaning procedure (detailed below)

• Test cooling efficiency

• Check drainage system

• Stock up on cleaning supplies

Monthly during peak season (June-September, December-February)

Time Investment: 10 minutes Prevents: 30% efficiency loss

• Quick filter rinse and dry

• Wipe exterior vents

• Check for unusual sounds or smells

• Run self-clean cycle

Fall maintenance (October-November)

Time Investment: 20 minutes Extends Lifespan: 2-3 years

• Final deep clean before winter

• Test heating function

• Clean remote control

• Document any needed repairs

Frequently asked questions

Which air conditioner is made in Japan?

Daikin, Mitsubishi Electric, and Hitachi are Japanese air conditioner manufacturers made in Japan.

How does AC work in Japan?

Typically, Japanese air conditioners are mounted on the wall near the ceiling, where you can select the angle and strength of the air being blown out.

What is the Japanese name for air conditioning?

In Japanese, "air conditioner" is called エアコン aircon, and the word derives from the English term and is composed of its first two syllables.

Which Japanese AC brand offers the best value?

Daikin leads in efficiency and longevity, Mitsubishi Electric excels in heating performance, and Hitachi provides solid budget options. For most users, mid-range Daikin units offer the best 10-year cost of ownership.

How much should I budget for AC electricity costs?

Summer: ¥8,000-15,000 monthly for a 2-bedroom apartment Winter: ¥6,000-12,000 monthly (heating is more efficient than cooling) Proper maintenance can reduce these costs by 15-25%

Can I install AC myself to save money?

No. Japanese law requires licensed technicians for refrigerant work. DIY installation voids warranties and violates building codes. Professional installation costs ¥15,000-25,000 but prevents ¥100,000+ damage from improper installation.

How often should I replace my AC unit?

10-12 years with proper maintenance. Replace earlier if:

• Repair costs exceed 50% of replacement cost

• Energy bills increase significantly despite maintenance

• Refrigerant leaks repeatedly

Do I need different settings for Japan's rainy season?

Yes! Use 除湿 (dehumidify) mode during tsuyu (June-July). This removes moisture without over-cooling, preventing mold while saving 30-40% on electricity compared to cooling mode.

In closing 

A well-maintained AC doesn't just save money—it ensures you stay comfortable during Japan's challenging summers and winters, making your life in Japan significantly more enjoyable.