Value Village ／ Food & living
This answer is a draft. It stays unpublished until legal review and source verification are complete.
The cutting board is one of the kitchen tools where bacteria linger most, and "wood or plastic?" is an argument that never ends in any country. In Japan, the Ministry of Health, Labour and Welfare's approach to preventing food poisoning at home is the foundation for the answer.
| Item | What to do | Basis |
|---|---|---|
| Separate boards | One board for raw meat and fish, another for vegetables and cooked food. With one board, cut vegetables first, then meat and fish | MHLW "Six points for preventing food poisoning at home" (don't contaminate) |
| Washing | Straight after use, with detergent and a sponge. After meat or fish, pour boiling water over it | Same |
| Disinfecting | About once a week: chlorine bleach (a few minutes at the concentration on the label) → rinse thoroughly, or boiling water | Same |
| Drying | Stand it up in a well-ventilated place until completely dry | Left damp, bacteria and mould grow |
| Wooden boards | Boiling water is fine; some bleaches damage the wood. After washing, wipe at once and stand up. If it warps or blackens, have it planed | — |
| Replacing | Deep scratches, black staining or warping are the signs | — |
[Verify] Check the wording of the six points and the ranking of causative agents in the food-poisoning statistics with the Ministry of Health, Labour and Welfare.
Some research finds that bacteria in the scratches of wood decline as it dries, and wood versus plastic is generally described as "it depends on the care." The key point is whether you can dry it.
Bleach struggles to reach the bottom of scratches, and a heavily scratched board can keep bacteria even after disinfecting. Once scratches are obvious, replacing it is the realistic answer.
Protein sets with heat and sticks on. The order is wash with detergent first, then boiling water.
Dirt works its way round the edges and joins, and the two sides mix when you wash it. Two boards in different colours, or a thin board sheet reserved for meat and fish, is the practical approach.
Wooden boards warp and crack in the dishwasher; with plastic, check the heat tolerance. If a board is labelled dishwasher-safe, a hot wash is effective.
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https://www.mhlw.go.jp/www1/houdou/0903/h0331-1.html
https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/kenkou_iryou/shokuhin/syokuchu/04.html
https://www.hokeniryo.metro.tokyo.lg.jp/shokuhin/
⚠️ 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.
Some ingredients need thorough cooking. Eat raw only foods that are sold for raw consumption. If you have allergies, check the ingredients.
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