Value Village ／ Everyday know-how
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Japan heats the floor rather than the air more than most countries — with hot-water floor heating in new homes, and electric heated carpets and rugs in older ones. To visitors it seems a luxury; it follows from sitting and sleeping close to the floor.
| Type | How | Cost to run | Notes |
|---|---|---|---|
| Hot-water floor heating (yuka-danbō) | Pipes under the floor, heated by a gas or heat-pump unit | ¥50–150 per day for a living room, depending on fuel | Standard in new detached houses; slow to warm (1 h), even heat, silent |
| Electric floor heating | Heating film or cable under flooring | Higher than hot-water for large areas | Retrofit in flats |
| Hot carpet (electric heated rug) | A rug with heating wires; 2 or 3 zones switchable | ¥5–15 per hour at full power (200–700 W); zones save power | The cheap option; put a rug on top to retain heat |
| Heated seat cushions / small mats | Personal | ¥1–3 per hour | Desk work |
| Kotatsu | See that article | Very low | Heats under a table only |
[Verify] Running costs with the Agency for Natural Resources and Energy's household energy guides; burn warnings with NITE and the Consumer Affairs Agency.
It is the logical way to heat a room where people live at floor level. Air heating at 20°C leaves the floor at 15°C; floor heating warms where you sit.
They are the classic low-temperature burn: 40–45°C for hours. Never sleep on one; do not let a child nap on one; switch off or use the timer.
Floor heating warms slowly (an hour for hot-water systems); hot carpets warm in minutes at medium. Timers are the tool: hot-water systems on 30 minutes before you get up.
A thin rug on a hot carpet improves comfort and reduces power use by holding heat. Thick futon or heavy furniture on the heating area is what the manuals forbid.
It heats the room it is in, and the person on it. Japanese homes still heat by room, not centrally; the corridor and bathroom stay cold, hence slippers and the bathroom heater (see the bath-safety article).
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https://ondankataisaku.env.go.jp/coolchoice/warmbiz/
https://www.nite.go.jp/jiko/chuikanki/
https://www.enecho.meti.go.jp/category/saving_and_new/saving/general/howto/
⚠️ Editorial note: the source URLs above were identified by search. Our working environment cannot reach go.jp domains, so the contents have not been checked against the text. Verify every source before publication and record who checked it and when.
What we share here are ideas and everyday practices passed down among people living in Japan, together with general information drawn from public sources. They are not official recommendations, and they are not professional instruction. Practices vary between households and regions.
This is general information. Results vary from person to person and depend on your own conditions and surroundings.
Please decide for yourself, using your own judgement, whether any of this suits your situation. We cannot accept responsibility for any damage, loss or injury arising from following this article.
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