Value Village ／ Food & living
This answer is a draft. It stays unpublished until legal review and source verification are complete.
"Stir-fry fast on high heat" is a rule that spread from Chinese restaurant cooking, and a home hob with a frying pan is a different matter. Japanese gas hobs also have a safety sensor that turns the flame down on its own, which puzzles many newcomers. Here we look at the output of a household hob, the heat limits of non-stick coatings, and what makes oil spit.
| Item | Content |
|---|---|
| Domestic gas hob output | About 2,000–4,200 kcal/h (high-output burner). A commercial Chinese wok burner is 10,000–30,000 kcal/h |
| Induction (IH) hob | Maximum 2,000–3,000 W. Heats only the pan base; the sides do not get hot |
| Non-stick coating heat limit | Starts to degrade at about 260°C; reached when heated empty or preheated on high |
| Smoke point of cooking oil | About 230–250°C (refined oils) |
| Ideal stir-fry temperature | 170–200°C (just before the oil starts to smoke lightly) |
| Amount of food | Up to 1/2–2/3 of the pan base. More and the temperature drops, water comes out and the food stews |
[Verify] Check the output figures against hob manufacturers and the Japan Gas and Kerosene Appliances Industry Association (JGKA), and Si-sensor behaviour against Ministry of Economy, Trade and Industry materials.
With a domestic hob, "a proper preheat and small batches" does more than high heat. Overfilling the pan drops the temperature and draws out water — the main cause of a soggy stir-fry.
Heating it empty on high passes 260°C and degrades the coating. Preheat on medium, add the oil, then heat. If it smokes, it is too hot.
The Si sensor has triggered at about 250°C. It is also a sign that the oil is too hot.
Induction is about 90% thermally efficient against about 40–55% for gas, and the pan base gets plenty hot. Lifting the pan stops the heating, so stir with the pan sitting on the hob — that is the induction method. Use a flat-based IH-compatible pan.
Sticking comes from too little heat and too much water. About a tablespoon of oil, and preheat well. With an iron pan, do abura-gaeshi (油返し — swirl hot oil around the pan, then pour it off) (see our iron frying-pan article).
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https://www.jgka.or.jp/
https://www.caa.go.jp/policies/policy/consumer_safety/caution/
https://www.enecho.meti.go.jp/
⚠️ 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.
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