Japanese Diet: What Washoku Is, Typical Foods, Research and Salt

The Japanese diet, often called washoku, is a way of eating built around rice, fish, soy foods, vegetables, seaweed and tea, served as several small dishes rather than one large plate. The traditional Japanese diet is low in red meat, dairy and sugar compared with American eating, and it has drawn research interest because Japan now has the longest life expectancy among the G7 countries. This guide explains what washoku means, which foods it centers on, what large Japanese studies found, and the one feature most experts flag: a lot of salt from soy sauce, miso and pickles.

Peptide Labs does not sell Japanese foods or a diet program. This article is general nutrition information, not medical advice.

What is the Japanese diet (washoku)?

Washoku literally means Japanese food, but UNESCO describes it as more than a menu. When it inscribed washoku on its Representative List of the Intangible Cultural Heritage of Humanity in 2013, UNESCO called it a social practice of skills, knowledge and traditions for producing, preparing and eating food, tied to respect for nature and the sustainable use of natural resources. It favors natural, locally sourced ingredients such as rice, fish, vegetables and edible wild plants, and the knowledge of how to season home cooking is passed down at shared family meals. The clearest example is New Year, when families pound rice cakes and prepare special dishes in which each ingredient has a symbolic meaning.

In everyday use, people in the United States usually mean the traditional Japanese diet of the mid-twentieth century rather than modern Japanese eating, which now includes far more meat, dairy and bread. A peer-reviewed review by Shoichiro Tsugane notes that rice intake in Japan has fallen since the war while meat, milk and dairy rose.

Traditional Japanese diet foods

Using food supply data from the Food and Agriculture Organization, Tsugane’s 2021 review found that Japan eats less meat (especially beef), dairy, sugar and fruit than the other G7 countries, but more fish and seafood, rice, soybeans and tea, mostly green tea. The core foods are:

• Rice, usually short-grain white rice, as the staple, with buckwheat and wheat noodles; see our buckwheat guide.
• Fish and seafood, grilled, simmered or raw, including oily fish such as mackerel and sardines.
• Soy foods: tofu, fermented natto, miso paste and soup, and edamame.
• Vegetables and mushrooms, such as daikon radish, bok choy-type greens and shiitake and other mushrooms.
• Sea vegetables such as nori, wakame and kelp (kombu), used in soups, salads and stock.
• Pickles and condiments: pickled vegetables, soy sauce, wasabi and other fermented foods.
• Tea: unsweetened green tea and powdered matcha.

The Japan Food Guide Spinning Top

Japan’s official picture of a balanced diet is the Japanese Food Guide Spinning Top, developed in 2005 by the Ministry of Health, Labour and Welfare and the Ministry of Agriculture, Forestry and Fisheries, according to the guide’s description in the BMJ and the Journal of the American Dietetic Association. It is based on the Dietary Guidelines for Japanese released in 2000. Instead of single foods, it counts servings of five kinds of dish: grain dishes (rice, bread, noodles), vegetable dishes (vegetables, mushrooms, potatoes and seaweed), fish and meat dishes (which include eggs and soybeans), milk, and fruit. The number of servings depends on a person’s sex, age and activity level, so there is no single plate for everyone.

What the research shows: associations, not proof

The largest study, published in the BMJ in 2016 by Kurotani and colleagues, followed 36,624 men and 42,970 women aged 45 to 75 for a median of 15 years. People whose eating most closely matched the Spinning Top had about 15% lower total mortality than those with the lowest scores, after adjusting for other factors. The link was clearest for deaths from cardiovascular disease, especially stroke; the association with cancer deaths was not statistically significant.

An earlier study by Oba and colleagues in Takayama followed 13,355 men and 15,724 women from 1992 to 1999. Higher adherence was associated with lower all-cause mortality in women, but no significant association was seen in men. Both studies relied on food frequency questionnaires, and the BMJ authors note theirs was not designed to measure the food guide, so the findings are associations that cannot separate diet from income, activity, healthcare and other habits.

Tsugane’s review gives the bigger picture. In the 1960s Japan had the shortest life expectancy among the G7 countries, largely because of high rates of stroke and stomach cancer. Today it has the longest. The low rates of heart disease are thought to reflect low obesity, low red meat intake, and high intake of fish, soybeans and green tea, while the drop in stroke and stomach cancer deaths is thought to reflect more animal foods and dairy alongside less salt. In other words, modern Japanese longevity followed a partly Westernized diet, not a frozen traditional one. For another pattern with a long research record, compare our guide to the Mediterranean approach, and for a regional Japanese pattern see our sibling guide to the Okinawa diet.

Salt: the main caution in a Japanese diet

Japan has a reputation for high salt intake. Tsugane reports that average intake fell from 14.5 grams of salt a day in 1973 to 9.5 grams in 2017, and that intake was likely higher still before 1973. The World Health Organization recommends that adults keep salt below 5 grams a day, equal to 2 grams of sodium, and says high sodium raises blood pressure, which increases the risk of cardiovascular diseases; WHO also lists gastric cancer among the conditions associated with high-sodium diets.

Most of the salt in washoku comes from seasonings rather than from the rice, fish or vegetables themselves. USDA values show how sharp the difference is:

Source: USDA FoodData Central, SR Legacy; % DV based on the FDA Daily Value for sodium. One tablespoon of shoyu supplies 879 milligrams of sodium per USDA, or 38% of the Daily Value, and miso and pickled vegetables add up quickly over a day. USDA also lists a low-sodium shoyu, and our sodium guide and salt substitutes article cover other ways to cut back.

Who should be careful

Soybeans, fish, Crustacean shellfish, wheat and sesame are all on FDA’s list of nine major food allergens, and all are common in Japanese cooking; regular shoyu is brewed from soy and wheat, which matters for people with celiac disease or a wheat allergy. People told by a clinician to limit sodium should watch soy sauce, miso and pickles. Seaweed and natto carry their own notes, covered in our kelp, nori and natto guides, which is worth reading if you have a thyroid condition or are on a blood thinner. A registered dietitian can help you adapt Japanese-style meals to your needs.

Cooking Japanese-style meals at home

A simple home version pairs a bowl of rice with a soup, a protein such as grilled fish or tofu, and one or two vegetable sides, finished with tea. Simmering in dashi stock, grilling and steaming are common methods, and many dishes are seasoned at the table, so it is easy to taste before adding soy sauce. Brown rice or mixed grains can stand in for some of the white rice if you prefer.

Frequently Asked Questions

Questions about a label? Contact us or read our Buyer’s Guide. Food comes first; ask a healthcare provider or a registered dietitian before changing your eating pattern, especially if you take medicines, are pregnant or are feeding a child. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Last reviewed October 2026.

Related guides: Okinawa Diet: What It Is, Okinawan Foods and the Longevity Research, Miso: USDA Nutrition, Sodium per Tablespoon, Types and Miso Soup, Natto: USDA Nutrition, Vitamin K2, Warfarin and Soy Allergy Notes.