Value Village ／ Everyday know-how
This answer is a draft. It stays unpublished until legal review and source verification are complete.
Every Japanese window and balcony door has a sliding insect screen, and residents use them from May to October as a matter of course. Visitors from countries without screens do not notice them; visitors from countries with fixed screens do not know they slide, come off, and need cleaning.
| Item | Detail |
|---|---|
| Position | Slides in the outermost track; it covers one half of the window opening at a time. Open the sash on the side the screen covers; open the other side and there is a gap at the centre frame |
| Removal | Lift the screen and swing the bottom out (some have a release tab at the top). Do it on a windless day; screens fall from balconies |
| Cleaning | Spring and autumn: hose or shower, soft brush, mild detergent, dry before refitting. In place: two sponges (one each side) or a screen roller; vacuum with a brush head for dust and pollen |
| Mesh | Grey or black polypropylene, 18–24 mesh; black is easier to see through, grey reflects more sun; finer (24–30) blocks small insects and some pollen |
| Replacement | Mesh, rubber cord and a roller tool: about ¥1,000–1,500 at any home centre; 30 minutes; renter-friendly (no damage to the frame) |
| Pets | Pet-proof mesh (thicker) and screen locks exist; cats push screens out |
| Balcony door | Magnetic screen curtain if the door has no built-in screen |
[Verify] The 2014 dengue outbreak with the Ministry of Health, Labour and Welfare; mesh specifications with manufacturers.
It slides, lifts out and needs washing twice a year. Pollen and city dust clog it by June.
Open the half the screen covers. Otherwise the frame between the sashes leaves a mosquito-sized gap — the classic error.
Re-meshing is a ¥1,000 DIY job with a roller tool; landlords expect tenants to do it, and home centres sell the kit next to the mesh.
Black mesh is markedly easier to see through; grey reflects heat slightly better. Choose for the room's use.
They are what lets Japanese homes ventilate through the humid months without insects — the precondition for the ventilation and mould habits described elsewhere.
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https://www.mhlw.go.jp/bunya/kenkou/kekkaku-kansenshou19/dengue_fever.html
https://www.env.go.jp/nature/dokuhou/
https://www.diy.or.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.
Always follow the instructions on any product you use, and never mix cleaning products. If you rent your home, check with your landlord before making any changes.
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