A Complete Guide for Visitors and New Residents:

If you’re in Japan—especially during summer—you’ll quickly notice air conditioners (エアコン, eakon) are everywhere. But using them can be tricky, with kanji-labeled remotes, multiple modes, and unfamiliar energy-saving features.

Cool vs Dehumidify: What’s the Difference?

Cool Mode (冷房 – Reibō)
  • Purpose: Lower room temperature fast
  • Symbol: ❄️ or “COOL”
  • Best for: Hot days (above 30°C / 86°F), when you need immediate relief
  • Electricity Use: Medium consumption
Dehumidify Mode (除湿 – Joshitsu)
  • Purpose: Remove moisture in the air
  • Symbol: 💧 or “DRY”
  • Best for: Humid, sticky days (especially during Japan’s rainy season in June–July)
  • Electricity Use: Depending on model can cost higher using ‘cool’
💡 Tip: Use Dry mode when the air feels muggy but not hot. It’s great for comfort and preventing mold build-up.

Basic Operation Instructions

JAPANESE ENGLISH FUNCTION
冷房 (Reibō)COOLCooling Mode
除湿 / ドライ (Joshitsu / Dry)DEHUMIDIFYDehumidifying Mode
暖房 (Danbō)HEATHeating Mode
送風 (Sōfū)FANFan Only
自動 (Jidō)AUTOAutomatic Mode
運転 / 停止 (Unten / Teishi)ON/OFFPower

Basic Cleaning & Maintenance Tips

  1. Turn off the power before cleaning.
  2. Clean filters every 2 weeks using water or a vacuum.
  3. Wipe vents and exterior with a damp cloth.
  4. Dry filters completely before reinstalling.
  5. Hire a professional for deep cleaning once a year.
⚠️ Important: After using Dry mode, clean the unit promptly. The internal moisture can lead to mold growth if left unchecked.

🧽 Additional Cleaning Tips

For a more thorough clean, here’s a step-by-step guide based on expert advice:

🧰 What You’ll Need

  • Air conditioner cleaning spray (available at drugstores or online)
  • Towels and newspapers
  • A soft cloth or toothbrush
  • Optional: handheld vacuum

🧼 Step-by-Step Cleaning Process

  1. Turn off and unplug the unit.
  2. Open the front panel and remove the filters.
  3. Vacuum the dusty side of the filters.
  4. Wash the filters with water and gently scrub.
  5. Dry the filters in the shade (avoid direct sunlight or hair dryers).
  6. Spray the inside of the unit with AC cleaner (avoid electrical parts).
  7. Wait 10 minutes, then reassemble and plug back in.
⚠️ Caution: Always read the manual before cleaning. For deep internal cleaning, consult a professional.

*For cleaning central aircon filters / cells, please see the video below:

🏠 Final Thoughts

Japanese air conditioners are efficient and adaptable, but they can take a little time to master. Whether you’re visiting temporarily or planning a long-term stay, learning how to use your AC correctly will keep you comfortable, reduce energy consumption, and help prevent issues like mold growth.

🌿 Energy-Saving Tips

  • Set the temperature to 26–28°C (79–82°F) for comfort and efficiency.
  • Use Dry mode during humid but not hot days.
  • Keep doors and windows closed to maintain temperature.
  • Use the timer function to avoid unnecessary operation.