Japanese Healing Foods: Traditional Foods and What Science Says

Traditional Japanese home cooking is built around rice, a soup and small side dishes of fish, soy foods, vegetables and seaweed, with green tea. This World Healing Foods guide looks at those foods and what research says, including one big watch-out: sodium. This page describes traditional foods and what research says about them. Foods support an overall healthy pattern; they do not treat any disease.

Food culture at a glance

The classic ichiju-sansai meal (one soup, three sides) emphasizes fish, vegetables and soy, and many dishes are steamed, simmered or grilled. That pattern includes plenty of fish and vegetables.

Top healing foods and what research says

Evidence notes

• Fish: EPA and DHA omega-3s are found in fish and other seafood, especially cold-water fatty fish such as salmon, mackerel, tuna, herring and sardines. (NIH ODS)
• Soy: NIH says consuming soy protein in place of other proteins may lower cholesterol to a small extent, and there are potential benefits for blood pressure and bone density, though effects vary. (NIH NCCIH)
• Green tea: in Asian populations, but not Western ones, green tea consumption has been linked to lower risk of coronary heart disease. No safety concerns are reported for green tea as a beverage in adults, but it contains caffeine, and extracts have been linked to rare liver injury. (NIH NCCIH)
• Seaweed: seaweed is generally rich in iodine, which the thyroid needs; getting too much iodine can cause goiter and thyroid problems. (NIH ODS)

Signature healthy dishes

• Grilled salmon or mackerel with rice, miso soup and vegetable sides
• Tofu and vegetable nabe (hot pot) with a light broth
• Soba with vegetables and edamame
• Hiyayakko (chilled tofu) with ginger and scallions
• Spinach ohitashi and a small seaweed salad

Watch-outs: sodium

• One tablespoon of soy sauce can have more than 800 mg of sodium. (Mayo Clinic)
• WHO recommends adults keep sodium under 2,000 mg a day (under 5 g of salt); high sodium raises blood pressure and heart disease risk. (WHO)
• Use reduced-sodium soy sauce, dip lightly, and go easy on miso soup, pickles (tsukemono) and ramen broth, which may add a lot of sodium. USDA data list about 450 mg of sodium in a 12-gram portion of miso (about 3,730 mg per 100 g; FDC ID 172442) (USDA FoodData Central), and about 1,090 mg in one large dill pickle (about 809 mg per 100 g; FDC ID 168558; a Western pickle, and Japanese tsukemono vary) (USDA FoodData Central).

How to try it

• Cultural tip: Japanese home meals are often built as rice plus a soup and two or three sides of vegetables, soy foods or fish.
• Include fatty fish such as salmon, mackerel or sardines, sources of EPA and DHA omega-3s. (NIH ODS)
• Use reduced-sodium soy sauce and dip lightly rather than pouring. (Mayo Clinic)
• Swap some white rice for brown rice, a whole grain. (WHO)

Conditions it may support

Pairing this pattern with lower salt may support our high blood pressure, high cholesterol and kidney stones Heal Stories. Related: Blue Zones foods, fermented foods and the microbiome, calcium-rich foods and ginger tofu stir-fry.

Cooking for kids? See Japanese food for kids for choking-safe prep, allergen tips and low-salt swaps.

Nearby cuisines: Korean healthy food · Cantonese healing foods · Sichuan food and health · Mediterranean diet foods list · World Healing Foods hub

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Related on HealAtlas: World Healing Foods hub · High Blood Pressure Heal Story · Blue Zones diet foods · Fermented foods · Nattokinase research

FAQ

Is Japanese food healthy?

Traditional meals rich in fish, soy, vegetables and seaweed may support a healthy diet. The main watch-out is sodium from soy sauce, miso and pickles; WHO advises adults keep sodium under 2,000 mg a day. (WHO) (WHO)

Is soy sauce bad for blood pressure?

It is very salty: one tablespoon can have more than 800 mg of sodium, and high sodium raises blood pressure. Use reduced-sodium versions and small amounts. (Mayo Clinic) (WHO)

Does green tea help your heart?

Studies in Asian populations, but not Western ones, link green tea to lower coronary heart disease risk. NIH says definite conclusions cannot yet be reached for most uses. (NIH NCCIH)

Can you eat too much seaweed?

Yes. Seaweed is rich in iodine, and getting too much iodine can cause goiter and other thyroid problems. Ask your doctor if you have a thyroid condition. (NIH ODS)

Is sushi healthy?

Sushi combines rice with fish and seaweed; fish provide EPA and DHA omega-3s and seaweed is rich in iodine. Dipping in soy sauce adds sodium quickly: one tablespoon can have more than 800 mg. (NIH ODS) (NIH ODS) (Mayo Clinic)

Is tofu healthy?

Tofu is a soy food. NIH says consuming soy protein in place of other proteins may lower cholesterol to a small extent, and soy may have potential benefits for blood pressure and bone density, though effects vary. (NIH NCCIH)

Sources

1. Mayo Clinic. Sodium: How to tame your salt habit. https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/sodium/art-20045479 (accessed Oct 25, 2026)
2. World Health Organization. Healthy diet fact sheet. https://www.who.int/news-room/fact-sheets/detail/healthy-diet (accessed Oct 25, 2026)
3. USDA FoodData Central. Miso, SR Legacy FDC ID 172442 (3,730 mg sodium per 100 g; typical portion 12 g). https://fdc.nal.usda.gov/food-search/?query=miso (accessed Oct 26, 2026)
4. USDA FoodData Central. Pickles, cucumber, dill or kosher dill, SR Legacy FDC ID 168558 (809 mg sodium per 100 g; large pickle = 135 g). https://fdc.nal.usda.gov/food-search/?query=pickles%20cucumber%20dill (accessed Oct 25, 2026)
5. World Health Organization. Sodium reduction fact sheet. https://www.who.int/news-room/fact-sheets/detail/sodium-reduction (accessed Oct 25, 2026)
6. Mayo Clinic. Dietary fiber: Essential for a healthy diet. https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/fiber/art-20043983 (accessed Oct 25, 2026)
7. Mayo Clinic. Whole grains: Hearty options for a healthy diet. https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/whole-grains/art-20047826 (accessed Oct 25, 2026)
8. NIH Office of Dietary Supplements. Omega-3 Fatty Acids: Fact Sheet for Consumers. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-Consumer/ (accessed Oct 25, 2026)
9. NIH Office of Dietary Supplements. Iodine: Fact Sheet for Consumers. https://ods.od.nih.gov/factsheets/Iodine-Consumer/ (accessed Oct 25, 2026)
10. NCCIH (NIH). Ginger: Usefulness and Safety. https://www.nccih.nih.gov/health/ginger (accessed Oct 25, 2026)
11. NCCIH (NIH). Probiotics: Usefulness and Safety. https://www.nccih.nih.gov/health/probiotics-usefulness-and-safety (accessed Oct 25, 2026)
12. NCCIH (NIH). Green Tea: Usefulness and Safety. https://www.nccih.nih.gov/health/green-tea (accessed Oct 25, 2026)
13. NCCIH (NIH). Soy: Usefulness and Safety. https://www.nccih.nih.gov/health/soy (accessed Oct 25, 2026)