Value Village ／ Clothing
This answer is a draft. It stays unpublished until legal review and source verification are complete.
"How many years do socks last?" and "When should I replace underwear?" are surprisingly common questions on forums worldwide. Japan has a habit of talking about a sock's "lifespan", and trade-body guides and everyday judgement are shared openly. Here is what people go by.
| Item | When to replace | Signs |
|---|---|---|
| Socks (a daily rotation of about 10 pairs) | 6 months to 1 year | Heel thin enough to see through, loose elastic, pilling, a smell that survives washing |
| Undershirts (T-shirts, vests) | 6 months to 1 year | Stretched neckline, yellowing, thin fabric |
| Pants and knickers | 6 months to 1 year | Stretched elastic, fabric going sheer |
| Bras | Around 100 wears (about a year at twice a week) | Bent wire, creased cups, loose even on the innermost hook |
| Sock elastic | — | Marks stay on the skin for a long time; the socks slide down |
[Verify] The guides are general figures based on guidance from textile and apparel trade bodies and major makers; they vary greatly with the product and how it is used.
Socks with thin heels slip inside the shoe and wear the shoe's lining too. Undershirts with slack elastic stop absorbing sweat.
Price and durability do not match. Reinforcing yarn, knit density and how you wash decide the lifespan far more.
Yellowing is oxidised skin oil. Oxygen bleach (酸素系漂白剤, sanso-kei hyōhakuzai) can lighten it, but repeated bleaching weakens the fabric. In practice, by the time it yellows, the fabric is at its limit too.
The wire and cups deform under the machine's force. The basics are hand-washing, or a mesh bag on a gentle cycle, hooks fastened, cups reshaped before drying; resting bras in rotation makes them last longer.
People in Japan cut waste by "buying several identical pairs, so an odd sock can be re-paired when its partner wears out", and by turning old underwear into cleaning rags.
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https://www.caa.go.jp/policies/policy/representation/household_goods/guide/fiber/
https://www.qtec.or.jp/
https://www.caa.go.jp/policies/policy/representation/household_goods/guide/wash_02.html
⚠️ 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.
Follow the care label and the maker's instructions for any garment, shoe or bag. For expensive or sentimental items, ask a specialist cleaner or repairer.
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