Yes, traditional Japanese food is widely considered one of the world's healthiest diets due to its emphasis on fresh, whole ingredients, fermented foods, lean proteins (fish, soy), fiber, and smaller portion sizes, contributing to Japan's high life expectancy and low obesity rates, though modern processed Japanese foods can be less healthy.
1/ Okinawan diet – Japan
So much so that Japan has the lowest obesity rates and third longest life expectancy of any developed country. The Okinawan diet is centred around fish, seafood, tofu, and other nutrient-rich ingredients. It's also extremely low in processed foods.
Yes, traditional Japanese cuisine is actually widely recognised as one of the healthiest cuisines in the world. From fresh seafood and seasonal vegetables to the philosophy of eating in moderation, it's a way of eating that supports both body and mind.
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The Japanese 80% rule, known as "Hara Hachi Bu", is a Confucian principle advising people to stop eating when they feel about 80% full, not completely stuffed, to support health and longevity. This practice encourages mindful eating, helps prevent overeating, and is linked to lower rates of illness and longer lifespans, particularly observed in Okinawan centenarians. It involves slowing down during meals, listening to your body's fullness cues, and appreciating food as fuel rather than indulging to the point of discomfort.
The traditional diet in Japan is built around a base of rice and other grains, with plentiful consumption of vegetables and fruits, and also fish, but relatively little animal fat, meat and sweets. In Japan, the presentation of the food is very important, and particular attention is given to the colors and textures.
The "Japan 5-minute rule" refers to extreme punctuality, meaning you should arrive 5-10 minutes before a scheduled time, as being exactly on time is considered late, demonstrating respect and reliability, a concept sometimes called "5-minute prior action" (５分前行動). It highlights Japanese culture's emphasis on preparedness, where trains are so precise that delays over 5 minutes get official notes, making being early a crucial part of business and social etiquette.
1. Almonds. There you have it — the humble almond can be considered the most nutrient-dense food on the planet. Used to the spotlight by now, almonds have been at the center of multiple studies on heart health and diabetes-related benefits.
A peanut butter and jelly sandwich (PB&J) adds about 33 minutes to your healthy lifespan per serving, according to a University of Michigan study that measured life expectancy impacts of over 5,850 foods using the Health Nutritional Index (HNI). This sandwich tops the list for adding time, with nuts and seeds also being highly beneficial (around 25 mins) and processed items like hot dogs subtracting time.
The 3-3-3 rule for weight loss is a straightforward habit-based approach: eat three balanced meals per day, drink three bottles (roughly 1.5–2 L) of water by around mid-afternoon, and engage in three hours of physical activity each week.
Some people move to Japan and slim down instantly with smaller portion sizes at restaurants, more veggies in their meals, and a greatly improved step count via the power of taking public transit.
Natto. Natto is a fermented soybean dish known for its strong aroma, sticky texture, and bold flavor. Though it's an acquired taste for some, it's one of the healthiest foods in the Japanese diet. Natto is typically eaten with rice and a touch of mustard or soy sauce.
Although the Japanese dietary pattern is considered to be based on dishes and meals made from a variety of unprocessed or less processed foods(21), HPF consumption may not be low, as Japan ranks 10th out of 80 countries in annual per capita retail sales of HPF(22).
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According to a nutrition-themed study, every soft drink you consume shaves 12 minutes off your life, while each hot dog reduces your life expectancy by 36 minutes. Other processed foods that can cost you valuable time include pizza and mac and cheese, while the toll for a piece of bacon is six minutes.
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The 2-2-2 food rule is a simple guideline for leftover safety: get cooked food into the fridge within 2 hours, eat it within 2 days, or freeze it for up to 2 months to prevent bacteria growth, keeping it out of the temperature "danger zone" (40-140°F or 5-60°C).
Dark green, leafy vegetables may all be considered superfoods, but many think kale wins the prize for its high levels of vitamins C and K – needed for normal bone function and blood clotting. Kale also contains lutein and zeaxanthin, two nutrients thought to be important for eye health.
1. Processed Meats Like Bacon, Hot Dogs, and Cold Cuts. Processed meats like bologna, ham, and bacon are high in calories and salt and are linked to increased risk of heart disease due to their impact on cholesterol and blood pressure, says Julia Zumpano, RD, registered dietitian at Cleveland Clinic in Ohio.
Japanese tend not to eat while walking along or standing around on the street. However, it is acceptable to drink while standing aside vending machines, which are ubiquitous in Japan. Eating and drinking on local trains is also frowned upon, but not long distance express trains such as the Shinkansen bullet train.
Japanese techniques for reducing belly fat focus on mindful practices like the "hara hachi bu" (eating to 80% full) for calorie control, posture-focused exercises like the Towel Exercise (lying on a rolled towel to realign the spine) and Long-Breath Diet (deep, prolonged breathing with core tightening), and movement like Japanese Walking (combining posture, breath, and pace). These methods aim for sustainable fat loss through improved metabolism, posture, and reduced calorie intake rather than quick fixes.
The U.S. dollar goes quite far in Japan currently due to a weaker yen, making food, transit, and attractions surprisingly affordable, with $1 USD getting you around 156 yen (as of early 2026), allowing budget travelers to enjoy meals for under $10 and museums for $5 or less, though high-end hotels and bullet trains still cost significantly more. You can find cheap eats at convenience stores (7-Eleven, Lawson) for a few dollars, while a bowl of ramen might be $10-$15, making a mid-range travel budget of $100-$200 per day feasible.