Moving to Japan means facing both muggy summers and nippy winters, and often in the same apartment! Today, we will demystify Japanese air conditioners so you can choose, install, and run one with all the confidence you need.
At a Glance
If you read nothing else, you need to read this! The figures below will help you plan a realistic budget for your new AC unit.
Average Unit Cost
- Small room (≈ 6 tatami / 10 m²) ¥50,000 – ¥70,000
- Medium room (≈ 10 tatami / 16 m²) ¥80,000 – ¥120,000
- Living room (≈ 14 tatami / 23 m²) ¥120,000 – ¥220,000
Standard Installation Fee
Electronic chains charge roughly ¥14,300 for units up to 3.6 kW and ¥19,800 for larger units. Window-type kits start around ¥7,700.
Typical Electricity Tariff (Tokyo, 2025)
Roughly ¥30–40 per kWh before subsidies.
Must-Know Remote Buttons
冷房 (cool) / 暖房 (heat) / 除湿 or ドライ (dehumidify) / 風量 (fan) / ECO (energy-saving)
Choosing the Right Air Conditioner
Japan offers more model variations per square metre than many other countries. Here is a quick primer to prevent either overpaying or under-cooling.
Unit Types
Most apartments rely on wall-mounted split systems paired with an outdoor condenser. Portable or window units exist, but they often violate rental rules due to vibration and drainage. Multi-split setups (one condenser feeding several rooms) suit larger homes, but central air is still rare.
Capacity & Price
Instead of BTU, temperature capacity is shown in tatami mats. A 6-tatami unit is roughly 2.2 kW; a 14-tatami living-room model exceeds 4 kW. Price rises steeply above 3.6 kW, at which point a 200 V outlet becomes mandatory.
Where to Buy
Big-box retailers bundle “standard installation” and extended warranties. Online marketplaces are cheaper for hardware, but the installation is left down to you. Make sure to ask your landlord before booking drilling work… especially in reinforced concrete walls.
Installation & Maintenance
Buying the right machine is only half the battle; you’ll need proper set-up to keep your air conditioner efficient for years.
Standard vs Premium Installation
The base fee covers up to 4 m of piping and balcony-level condenser placement. Longer pipe runs, second-floor work, or wall brackets can push labour costs to ¥30,000–¥70,000. Core-drilling concrete adds about ¥12,000 per hole.
Understanding the Remote
- 運転／停止 On / Off
- 運転切換 Mode cycle (cool, heat, dehumidify, fan)
- 温度 ▲/▼ Set temperature
- 風量 Auto / High / Low
- ECO / 不在ECO Cuts power when you are away
Routine Care
Rinse dust filters every two weeks in peak season and let them dry fully before you reinsert them. Schedule a professional coil cleaner every two years (¥10,000–¥15,000) to stop mould and odours.
Why Japanese ACs Feel Different
Heat-Pump Convenience
One unit reverses its refrigerant cycle to deliver both cooling and heating, which is handy in homes without radiators.
Inverter Efficiency
Inverter compressors modulate speed instead of starting and stopping, trimming electricity use by up to 30 %. Check the annual performance factor (APF): higher numbers mean better year-round efficiency.
Smart & Silent Perks
Wi-Fi scheduling, voice control, pollen-removal, and sub-20 decibel night modes have become standard on mid-range models.
Cutting Your Power Bill
Eco Modes & Timers
ECO nudges the set-point by ±1 °C and slows the fan—often saving 10 % instantly. Sleep timers shut the unit off after you doze; start-up timers pre-cool before you get home.
Subsidies & Rewards
Eco-labelled units qualify for point rebates at checkout, and temporary government relief trims a few yen per kWh directly from your bill.
Seasonal Tactics
Close doors and curtains, switch to dehumidification (除湿) on humid yet mild days (about 30 % cheaper than full cooling), and in winter set 20 °C while supplementing with a heated table or small space heater.
Key Takeaways
- Match capacity to tatami count and ensure the outlet voltage is correct.
- Choose an inverter model with a solid APF rating.
- Clean the filters every few weeks and book professional cleaning every two years.
- Leverage ECO modes, timers, and common-sense habits to stay comfortable without injuring your wallet.
Master these basics, and your AC remote transforms from a kanji puzzle into a trusted year-round lifesaver. Welcome to breezy living in Japan!
