Value Village ／ Food & living
This answer is a draft. It stays unpublished until legal review and source verification are complete.
Cling film (called "wrap", ラップ, in Japan) and aluminium foil are in every kitchen in the world, yet people hesitate over "can this go in the microwave?" and "which do I wrap it in?" Japanese cling film comes in two material families, and the answer depends on reading the label.
| Item | PVDC cling film | PE cling film | Aluminium foil |
|---|---|---|---|
| Heat tolerance | About 140°C | About 110°C | Takes high heat (not for the microwave) |
| Cold tolerance | About −60°C | About −70°C | Freezer-safe |
| Cling and barrier | High (blocks smells and oxygen well) | Lower | Blocks light and oxygen |
| Microwave | Yes (some makers advise keeping it off direct contact with the food) | Yes (may melt on oily foods) | No (sparks, fire) |
| Best for | Fridge and freezer storage, blocking smell transfer | Temporary covering, low cost | Oven and grill, as a drop-lid (otoshibuta), foil-wrapped baking |
[Verify] Heat tolerances are guide figures based on the labels of major products. Check the microwave precautions with each maker and with Consumer Affairs Agency material.
Metal reflects microwaves and causes sparks and fire. Foil is for the oven function. In an oven toaster, place it where it does not touch the heating element.
PE film can melt at around 110°C, and even PVDC film gets hot on the surface of oily foods. The rule is drape it loosely over the dish and leave a gap above the food.
Umeboshi (pickled plums), pickles, tomatoes, lemons and miso corrode aluminium, causing holes and black marks. Wrap in cling film first, then foil — or use a container.
The main job of cling film is to cut food waste by preventing drying, oxidation and smell transfer. More people are combining it with reusable lidded containers, silicone lids and beeswax wraps, choosing whichever fits.
A paper cutter can still cut you. Keep the box out of children's reach. PVDC film gives off chlorine-based gas when burned, so follow your municipality's sorting rules when disposing of it (usually "burnable waste" or "plastics").
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https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/kenkou_iryou/shokuhin/kigu/index_00001.html
https://www.caa.go.jp/policies/policy/consumer_safety/caution/
https://www.jpfa.gr.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.
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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