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Japanese diet: how to lose weight on it

, medical expert
Last reviewed: 03.07.2025
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The "Japanese diet" is one of many diets that have been associated with Japan at various times. However, it is important to understand that there is no one universal Japanese diet, and that such diets usually have no official status or scientific support. The name "Japanese diet" can be attributed to a variety of eating patterns, often based on limited carbohydrate and calorie intake.

Below are some of the Japanese diet variations that are mentioned from time to time:

  1. Rice Diet: This diet option involves consuming large amounts of rice, vegetables, and seafood, and limiting fat and sugar intake.
  2. Okinawa Diet: The Okinawa region of Japan is famous for its longevity. The Okinawan diet includes lots of vegetables, little meat, and moderate consumption of fish and soy products.
  3. Morikawa Naoko Diet: This diet follows certain principles such as moderate calorie intake, portion control, and an active lifestyle.

Rice based diet

It is a diet in which rice plays a major role and is the main source of carbohydrates. Such a diet can include different types of rice, such as white, brown, wild, smooth, sticky and others. A rice-based diet can be limited and monotonous, so it should be considered as a temporary solution or part of a diet plan.

Here are some general aspects of a rice-based diet:

  1. Rice Variety: You can use different types of rice to add variety to your diet. For example, white rice has a more neutral taste, while brown rice is rich in nutrients.
  2. Vegetables and Protein: Even on a rice-based diet, it is important to include vegetables and proteins in your diet to ensure complete nutrition. Vegetables add vitamins, minerals, and fiber, while proteins are essential for tissue growth and regeneration.
  3. Monotony: Many people may find a rice-based diet monotonous and boring. Therefore, it is important to look for ways to add variety, such as with different seasonings and additions.
  4. Portions: Portion control is important to avoid excess calorie intake. Rice is a carbohydrate food, so portions should be reasonable.
  5. Drink: Apart from rice, you should pay attention to drinking water and other beverages to maintain hydration.
  6. Calorie balance: If your goal is weight loss, calorie balance is key. Even on a rice-based diet, you must consider the total number of calories you consume.
  7. Consistency and Moderation: A rice-based diet can be useful for short-term weight loss, but it is not always suitable for long-term use. Moderation and variety are important.

Okinawa Diet

Also known as the Okinawan diet, it is based on the eating habits and lifestyle of the Okinawans, who are renowned for their long life expectancy and low incidence of chronic diseases. The Okinawan diet emphasizes eating natural, low-fat foods and moderate calorie intake. Here are the basic principles of the Okinawan diet:

  1. Plant-Based Diet: The main part of the diet is fruits, vegetables, grains, legumes and nuts. Okinawans eat a lot of greens, sweet potatoes, soybeans and tahini (sesame paste).
  2. Moderate Protein Intake: Although many Japanese eat seafood, Okinawans prefer plant-based proteins such as tofu and soy products. Fish is also part of their diet.
  3. Moderate Calorie Intake: Okinawans do not consume a lot of calories and their portions are smaller than many other cultures.
  4. Avoiding Excess Fat Consumption: Okinawans avoid foods high in saturated fats such as butter and meat.
  5. Avoiding Sugar and Processed Foods: They prefer natural and low-fat foods and try to avoid sugar and high-calorie snacks.
  6. Eat slowly and moderately: Okinawans follow the principle of "hara hachi bu" (stop eating when the stomach is half full). This encourages portion control and helps avoid overeating.
  7. Moderate Alcohol Consumption: Many Okinawans drink small amounts of alcohol, especially sake and Okinawan ryuyu (a local alcoholic drink).

The Okinawan diet has been studied as a potential contributor to longevity and health. However, it should be noted that many aspects of Okinawan longevity are related not only to their diet but also to their lifestyle, including activity, social support, and stress tolerance.

As with any diet, it is important to approach the Okinawa diet wisely and consider your individual needs and preferences. If you are considering this diet, it is recommended that you consult with your doctor or nutritionist to ensure that it is right for you.

Morikawa Naoko Diet

This is a diet that gained popularity thanks to the book "The Secrets of Morikawa Naoko's Diet" written by Japanese actress Morikawa Naoko. In the book, the author describes her approach to nutrition and how she was able to maintain her slim figure. It is important to note that this is not a scientifically proven diet, but rather the personal experience of the actress. Below are the main principles of the Morikawa Naoko diet:

  1. Moderate Portions: The author suggests reducing portion sizes and not overeating. She encourages controlling the amount of food you eat and stopping when you feel full.
  2. Chewing slowly: Morikawa Naoko emphasizes the importance of chewing food slowly and thoroughly. This, she believes, helps with better absorption of food and appetite control.
  3. Vegetables and Fruits: Morikawa Naoko's diet includes plenty of vegetables and fruits. She recommends adding them to every meal.
  4. Snack Replacement: Instead of sweets and other undesirable snacks, the author suggests replacing them with healthy alternatives such as nuts or dried fruit.
  5. Exercise: Morikawa Naoko maintains regular exercise and an active lifestyle.
  6. Maintaining a regime: The author advises sticking to regular meals and avoiding snacks between meals.

It is important to note that the Morikawa Naoko Diet is not scientifically proven and may not be suitable for everyone. As with any diet, it is important to consider your individual needs and consult with your doctor or nutritionist before starting a new diet plan. It is also important to remember that successful weight loss and maintaining a healthy lifestyle require a comprehensive approach, including a balanced diet and regular physical activity.

Regardless of which "Japanese diet" you choose, it is important to remember that diets that are too restrictive can be ineffective and unhealthy. Most balanced diets, including the traditional Japanese diet, can be healthy and help you reach your goals if followed in moderation and combined with physical activity. If you are considering following any specific diet, it is always best to consult with a doctor or nutritionist to ensure that it is right for you.

Indications

The name "Japanese diet" is commonly used to describe a variety of dietary approaches that are believed to help with weight loss and overall health. However, it is important to emphasize that there are no specific medical indications for prescribing a "Japanese diet" in the same way that there are medical recommendations for specific dietary treatments.

Many "Japanese diets" advocate restricting carbohydrate intake, reducing calories, and controlling portion sizes. These principles can be useful for people who are trying to lose weight or maintain a healthy weight. Thus, the main reason for following a "Japanese diet" may be to lose weight or improve overall health.

Additionally, some people may use the "Japanese diet" as a way to experiment with different eating methods or as a temporary strategy to achieve their goals. However, before trying any diet, including the "Japanese diet," it is recommended to consult with a doctor or nutritionist, especially if you have any medical conditions or dietary restrictions. Since "Japanese diets" can have different variations and principles, it is important to choose the approach that best suits your goals and needs.

General information Japanese diet

The Japanese diet is one of many popular weight loss diet programs. It is called "Japanese" because of its association with Japan, but there is no definitive proof that this diet actually originated in Japan. This diet promises rapid weight loss in a short period of time, but it is not sustainable and may not be advisable for long-term use. It is important to remember that the effectiveness and safety of any diet may vary depending on the individual.

The basic principles of the Japanese diet include:

  1. Calorie restriction: The Japanese diet suggests limiting your calorie intake to a minimum. This usually means reducing the amount of food you eat.
  2. Carbohydrate Restriction: The diet states that carbohydrates, especially fast carbohydrates, should be minimized. This means eliminating bread, potatoes, sweets, and other high-carbohydrate foods.
  3. Protein intake: The Japanese diet involves increasing the intake of protein such as fish, chicken and eggs.
  4. Limit Fat: The diet advises reducing fat intake, including butter and high-fat dairy products.
  5. Vegetable intake: To increase food volume and vitamin intake, the diet includes vegetables.
  6. Limiting foods containing sugar: Consumption of sugar and sweet drinks is prohibited.

Throughout the entire diet period – 13 days – a person limits their diet to vegetables, rice and some other healthy foods, and as for drinks, they can drink coffee and green tea without sugar.

There is a nuance: a person prepares himself for this diet (as, indeed, for most other diets) gradually, so as not to subject the body to stress by sharply limiting his diet.

Pros and Cons of the Japanese Diet

The "Japanese Diet" is one of many diets that are associated with Japan. It may have its pros and cons, but it is important to remember that these effects may be different for each person. Here are some pros and cons of the "Japanese Diet":

Pros:

  1. Weight loss: Many people who follow the Japanese diet report weight loss. This may be due to the limited calorie intake and moderate food consumption.
  2. Healthy Eating: The traditional Japanese diet is typically rich in fresh vegetables, fish, seafood, and herbs, which can promote overall health.
  3. Moderate Meat Consumption: The Japanese diet encourages moderate meat consumption and a preference for plant proteins, which may reduce the risk of obesity and cardiovascular disease.
  4. Rich in Omega-3 Fatty Acids: Fish, often eaten in the Japanese diet, is an excellent source of omega-3 fatty acids, which have positive effects on heart and brain health.

Cons:

  1. Dietary restrictions: The Japanese diet can be too restrictive and limit the variety of foods, which can lead to deficiencies in certain vitamins and minerals.
  2. Low Calorie Intake: Limited calorie intake may not be enough for the body to function properly and may cause feelings of hunger and weakness.
  3. Difficult to Follow: The diet can be difficult to follow due to its strict rules and restrictions.
  4. Unknown long-term health effects: The long-term health effects of the "Japanese diet" are not well researched, and it may have both positive and negative effects.
  5. Lack of personalization: Like most diets, the "Japanese diet" does not take into account the individual needs and characteristics of each person.

Before starting any diet, including the "Japanese diet", it is recommended to consult with a doctor or nutritionist. They can help you develop a healthy and balanced diet plan that will meet your needs and goals.

Benefits

The traditional Japanese diet is known for its lightness, variety, and emphasis on fresh, natural ingredients. Although the "Japanese diet" can be interpreted in many ways, the principles of the traditional Japanese diet can have many health benefits. Here are some of the benefits of the Japanese diet:

  1. Low in saturated fat: Traditional Japanese diets tend to be lower in saturated fat, which may reduce the risk of heart disease.
  2. Rich in Omega-3 Fatty Acids: Fish, especially fatty varieties such as salmon and tuna, are a common part of the Japanese diet and are an excellent source of omega-3 fatty acids, which have positive effects on heart and brain health.
  3. Moderate Meat Consumption: The traditional Japanese diet teaches moderate meat consumption and frequent consumption of plant-based proteins such as tofu and soy products. This may reduce the risk of obesity and related diseases.
  4. Rich in Vitamins and Minerals: With an emphasis on vegetables, greens, and seafood, the Japanese diet can provide the body with vitamin- and mineral-rich foods.
  5. Moderate sugar intake: The traditional Japanese diet is generally lower in added sugar, which can help control blood sugar levels and reduce the risk of diabetes.
  6. Fermented Foods: The Japanese diet also includes many fermented foods, such as miso and kimchi, which may support gut health and the immune system.
  7. Moderate alcohol consumption: Japan has a tradition of drinking alcohol, such as sake, in moderation, which may be associated with some health benefits, including a reduced risk of heart disease.

It is important to note that the "Japanese diet" may vary depending on the region and individual preferences. As with any diet, the key is a varied and balanced diet, as well as moderate calorie intake, combined with an active lifestyle. Before making any drastic changes to your diet, it is always recommended to consult with a doctor or nutritionist to assess your health status and individual needs.

What can and what can not?

The Japanese diet offers certain rules regarding what you can and cannot eat. However, it is important to remember that this diet is considered too restrictive and nutritionally incomplete, and its long-term adherence may not be advisable due to possible nutritional deficiencies. Here are general guidelines for foods that can and cannot be consumed as part of the Japanese diet:

What is possible:

  1. Fish: Fish is an important source of protein and healthy fats in the Japanese diet. Tuna is a particularly popular type of fish.
  2. Chicken: Chicken meat is also included in the Japanese diet as a source of protein.
  3. Eggs: Eggs can be eaten, for example, in the form of an omelette.
  4. Vegetables: Vegetables such as cabbage, broccoli, spinach and carrots can be used in salads and side dishes.
  5. Grapefruit: This fruit is often included in the Japanese diet as it is believed to aid in fat burning.

What you can't do:

  1. Bread and Bakery Products: The Japanese diet limits the consumption of bread and other carbohydrate-rich foods.
  2. Sugar and sweets: Consumption of sugar, candies, cakes and other sweets is prohibited.
  3. Dairy Products: Dairy products and cheeses are generally excluded from the Japanese diet.
  4. Alcohol: Alcohol should be avoided on this diet.
  5. Potatoes: Potatoes, including potato dishes, are also excluded from the diet.

It is important to note that the Japanese diet can be too restrictive and lacking in nutritional diversity, and it does not provide all the necessary nutrients. This can lead to a lack of vitamins, minerals, and fiber. Following such a diet for a long time can be harmful to health. It is recommended to consult a doctor or nutritionist before starting any diet.

Since you will have a strict restriction in products during the Japanese diet for almost 2 weeks, you should not leave your body without vitamins. Therefore, consult with your gastroenterologist and buy a vitamin complex.

This way you can not only lose weight, but also saturate your body with essential microelements that are beneficial for development.

It is very important during the Japanese diet not to change any of the suggested products throughout the entire period of weight loss.

Contraindications

The "Japanese diet" is one of many diets that restrict calories and certain foods. This diet may have the following contraindications and risks:

  1. Nutrient Deficiencies: The "Japanese Diet" may be deficient in many important nutrients such as proteins, fats, vitamins and minerals. This can lead to a lack of energy and illness due to vitamin and mineral deficiencies.
  2. Excessive Calorie Restriction: This diet involves very low calorie intake, which can cause hunger, weakness, dizziness, and other unpleasant side effects.
  3. Unbalanced: The "Japanese diet" menu is often unbalanced and can be monotonous. This can lead to boredom and make it difficult to stick to the diet long-term.
  4. Restricting Food Choices: Severely restrictive diets can be difficult to maintain in everyday life and can cause stress and social difficulties.
  5. Unwanted Side Effects: Some people may experience side effects such as headache, nausea, constipation or diarrhea while following this diet.
  6. Contraindications for certain groups of people: The "Japanese Diet" may be dangerous or unbalanced for children, teenagers, pregnant and lactating women, and people with certain medical conditions such as diabetes or heart disease.
  7. Health Risks: Long-term adherence to very low-calorie diets may have negative effects on overall health and lead to loss of muscle mass.

Before starting any diet, including the "Japanese diet", it is recommended to consult with a doctor or nutritionist. They can help determine if the diet is right for you and develop a more balanced and safe diet plan based on your individual needs and health.

Possible risks

The "Japanese diet" is one of many diets that involve restricting calories and certain foods. While it may help you lose weight, it is also associated with a number of potential risks and unwanted health effects. Here are some of the possible risks associated with the "Japanese diet":

  1. Nutrient deficiencies: The diet is very restrictive in food choices and may not provide enough important nutrients such as proteins, fats, vitamins and minerals. This can lead to vitamin and mineral deficiencies, which can cause various diseases.
  2. Hunger and Weakness: Due to low calorie intake, many people may experience hunger, weakness, dizziness, and irritability.
  3. Loss of Muscle Mass: A diet that is low in protein can lead to loss of muscle mass, which is not a desired outcome.
  4. Long-Term Health Issues: In the long term, following this diet for a long time may cause medical problems such as metabolic disorders, nutritional imbalances, and complications related to nutritional deficiencies.
  5. Stress and psychological problems: Restrictive diets can cause stress and depression in some people due to constant hunger and food restrictions.
  6. Fluid Loss: Many versions of the "Japanese Diet" also recommend restricting fluid intake, which can lead to dehydration and other health problems.
  7. Limitation of Social Activity: Due to the strict dietary rules, following the "Japanese diet" can make it difficult to socialize with friends and participate in social events that involve food.
  8. Yo-Yo Effect: Like many other restrictive diets, the Japanese Diet can cause a yo-yo effect after the diet is completed, with the weight returning and even exceeding the original level.

When choosing a diet, it is important to consider all aspects of it and consult with a doctor or nutritionist to choose an eating plan that is safe and suitable for you and your health.

Menu for 14 days of Japanese diet

The "Japanese Diet" is one of the various diets that are offered for weight loss. However, it should be noted that there is no one officially approved version of this diet, and menus may vary depending on the source. Below is a general menu for the "Japanese Diet" for 14 days:

Day 1:

  • Breakfast: a cup of black coffee without sugar
  • Lunch: 2 eggs, fresh vegetable salad, orange
  • Dinner: chicken fillet, fresh vegetable salad, grapefruit

Day 2:

  • Breakfast: a cup of black coffee without sugar, toast
  • Lunch: chicken fillet, fresh vegetables, juice
  • Dinner: red fish, fresh vegetable salad

Day 3:

  • Breakfast: a cup of black coffee without sugar
  • Lunch: egg, cheese, fresh vegetable salad
  • Dinner: fruits of your choice

Day 4:

  • Breakfast: a cup of black coffee without sugar, toast
  • Lunch: chicken fillet, fresh vegetable salad, orange
  • Dinner: cottage cheese, honey

Day 5:

  • Breakfast: a cup of black coffee without sugar
  • Lunch: red fish, fresh vegetables
  • Dinner: chicken fillet, fresh vegetable salad

Day 6:

  • Breakfast: a cup of black coffee without sugar, toast
  • Lunch: egg, fresh vegetable salad
  • Dinner: fruits of your choice

Day 7:

  • Breakfast: a cup of black coffee without sugar
  • Lunch: chicken fillet, fresh vegetables, orange
  • Dinner: cottage cheese, honey

Day 8-14: Repeat menu from day 1.

Please note that this "Japanese diet" menu does not provide complete and balanced nutrition. It severely limits calories and food variety, which can lead to deficiencies in some important nutrients. Following this diet long-term can be harmful to your health.

Results of the Japanese Diet

The "Japanese diet" may result in weight loss, but the results may be temporary and come with health risks. The effectiveness of the diet may depend on many factors, including your starting weight, lifestyle, and individual characteristics. Here are some of the possible results of following the "Japanese diet":

  1. Weight Loss: By restricting calories and reducing the consumption of certain foods, many people can achieve weight loss in a short period of time.
  2. Fluid Loss: Initial weight loss on the "Japanese Diet" is often due to fluid loss due to the restriction of salt and reduced carbohydrate intake.
  3. Yo-yo effect: After finishing a diet, when you return to your normal diet, there is a risk that the weight will return and even exceed the initial level. This is called the yo-yo effect.
  4. Health problems: The nutritional deficiencies caused by the limited diet of the "Japanese diet" can have negative effects on health and cause various medical problems.
  5. Stress and psychological problems: Following a strict diet can cause stress and depression due to constant hunger and food restrictions.
  6. Short duration: Many people lose interest in such strict diets after a short time due to their strictness and restrictions.
  7. Risk of complications: Long-term adherence to the "Japanese diet" can lead to metabolic disorders, nutritional imbalances and other health problems.

Please remember that the "Japanese diet" is not a long-term solution for weight management and may be dangerous to your health. If you are planning to lose weight, it is recommended that you consult a nutrition or health professional to develop a more balanced and safe diet plan that will meet your needs and maintain your health.

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