What are the common misunderstandings about salt intake?
This answer is a draft. It stays unpublished until legal review and source verification are complete.
Cutting salt is a challenge everywhere, but Japan is one of the higher-salt countries by international standards. Soy sauce, miso and pickles are central to the food culture, so people here have built up a stock of ideas about where to cut first. If you have moved to Japan and started eating Japanese food daily, this article is for you.
In numbers
| Item | Figure | Source |
|---|---|---|
| Average daily salt intake in Japan (age 20 and over) | About 9.8 g (men 10.7 g, women 9.1 g) | National Health and Nutrition Survey (2023) |
| Target in the Dietary Reference Intakes for Japanese (2025 edition) | Under 7.5 g for men, under 6.5 g for women | MHLW |
| Health Japan 21 (third term) target | Under 7 g | MHLW |
| WHO recommendation | Under 5 g | WHO |
Under the Food Labelling Act (食品表示法), processed food must show "salt equivalent" (食塩相当量) on the nutrition label (fully in force since April 2020). The conversion is sodium (mg) × 2.54 ÷ 1000 = salt equivalent (g).
| Common seasoning or food | Approximate salt equivalent |
|---|---|
| Soy sauce, 1 tablespoon (18 g) | About 2.6 g |
| Miso, 1 tablespoon (18 g) | About 2.2 g |
| Umeboshi (pickled plum), 1 piece (10 g) | About 2.0 g |
| Instant cup noodles, 1 serving | About 5–6 g |
| Sliced white bread (shokupan), 1 slice from a 6-slice loaf | About 0.7 g |
[Verify] Check intake against the latest year of the National Health and Nutrition Survey, and the targets against the "Dietary Reference Intakes for Japanese (2025 edition)". The food figures are rough estimates based on the Standard Tables of Food Composition in Japan (8th revised edition).
Misunderstanding 1｜Japanese food is healthy, so salt is not a problem
Salt is precisely the weak point of Japanese food. It is concentrated in soups, pickles, dried fish and fish-paste products (kamaboko, chikuwa etc.). Limiting soup to one bowl a day and keeping pickles to a small portion are the standard salt-cutting habits among people living in Japan.
Misunderstanding 2｜With reduced-salt soy sauce you can use as much as you like
Reduced-salt soy sauce (減塩しょうゆ, gen'en shōyu) still contains roughly half the salt of the regular kind. Use twice as much and you are back where you started.
Misunderstanding 3｜If you sweat, load up on salt
Heavy sweating does call for replacement. But in ordinary daily life and light exercise, food usually provides enough, according to the general guidance. Drinking sports drinks as a habit also needs care because of the sugar.
Misunderstanding 4｜Using dashi stock automatically cuts salt
The umami in dashi supplements saltiness and makes it easier to use less soy sauce and miso. But many granulated dashi products contain salt, so check the label.
Misunderstanding 5｜"Sodium" and "salt equivalent" on a label are the same number
400 mg of sodium is roughly 1 g of salt equivalent. Mix up the units and the figure looks a quarter of its real size. Labels in Japan now show salt equivalent as the rule.
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Sources
- MHLW, "Dietary Reference Intakes for Japanese (2025 edition)" [日本人の食事摂取基準（2025年版）]
https://www.mhlw.go.jp/stf/newpage_44138.html
- MHLW, "Outline of Results of the 2023 National Health and Nutrition Survey" [令和5年 国民健康・栄養調査結果の概要]
https://www.mhlw.go.jp/stf/newpage_47433.html
- Consumer Affairs Agency, "Food Labelling Standards" [食品表示基準] (nutrition labelling, salt equivalent)
https://www.caa.go.jp/policies/policy/food_labeling/nutrient_declearation/
⚠️ 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.
About this article
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.
This article is not meant to diagnose or manage any specific medical condition. If you are worried about your health, see a doctor rather than relying on your own judgement.
Sources
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