Why Protein Matters in a Plant-Based Diet
Protein is one of the most important nutrients for maintaining energy, repairing muscles, and supporting overall health.
For people who follow a vegan or plant-based lifestyle, it’s essential to know reliable protein sources.
Japanese cuisine offers many traditional foods that are naturally rich in protein. These ingredients have been enjoyed for centuries and continue to be staples in modern plant-based cooking.
Tofu (豆腐)

What it is
Tofu is made by curdling soy milk and pressing it into blocks. It is available in several textures such as silken, medium, and firm.
Nutrition
- High in protein, low in calories
- Good source of iron and calcium
- Easily digestible
How to use it
- Add silken tofu to miso soup
- Pan-fry firm tofu for stir-fries
- Crumble and season as scrambled tofu with turmeric and soy sauce
Natto (納豆)

What it is
Natto is fermented soybeans with a sticky texture and strong aroma. While it may take some time to get used to, it is highly nutritious.
Nutrition
- High in protein and dietary fiber
- Contains vitamin K2 for bone health
- Provides probiotics for gut health
How to use it
- Serve over rice with soy sauce and mustard
- Mix with chopped green onions or kimchi
- Use as a filling for sushi rolls
Okara (おから)

What it is
Okara is the pulp left after making soy milk or tofu. Though often considered a byproduct, it is versatile and nutrient-rich.
Nutrition
- High in protein and fiber
- Low in fat
- Budget-friendly and eco-friendly
How to use it
- Add to veggie patties or croquettes
- Stir into soups or stews
- Mix into baked goods for extra nutrition
Koya Dofu (高野豆腐, Freeze-Dried Tofu)

What it is
Koya dofu is tofu that has been frozen and dried. When rehydrated, it has a spongy texture that absorbs flavors beautifully.
Nutrition
- Concentrated source of protein
- Rich in calcium and iron
- Long shelf life, convenient for storage
How to use it
- Simmer in soy sauce broth for a traditional side dish
- Add to miso soup for extra protein
- Rehydrate and stir-fry with vegetables
Wheat Gluten: Fu (麩) and Seitan

What it is
Fu is a traditional Japanese wheat gluten product used in Buddhist temple cuisine (shojin ryori). Seitan is its Western version, made from concentrated wheat protein.
Nutrition
- Very high in protein
- Low in fat
- Chewy, meaty texture
How to use it
- Add dried fu to soups or simmered dishes
- Grill or stir-fry seitan as a meat alternative
- Simmer fu with vegetables in soy-based broth
Soy Meat (大豆ミート, Textured Vegetable Protein)

What it is
Soy meat, also known as textured vegetable protein (TVP), is made from defatted soy flour. It is available in chunks, slices, or granules.
Nutrition
- High in protein
- Cholesterol-free and low in fat
- Shelf-stable and easy to store
How to use it
- Rehydrate and use for vegan gyoza filling
- Add to Japanese-style curry
- Cook in ginger stir-fry as a pork substitute
Edamame (枝豆)

What it is
Edamame are young soybeans harvested before hardening. They are one of the simplest and most popular plant-based snacks.
Nutrition
- Rich in protein and fiber
- Contains folate and vitamin C
- Naturally gluten-free
How to use it
- Boil in salted water for a quick snack
- Add to salads or rice bowls
- Blend into creamy dips or spreads
Other Plant-Based Protein Sources in Japan
Tempeh
A fermented soybean product originally from Indonesia, now commonly available in Japan. Firm texture and nutty flavor make it versatile.
Sesame Seeds (ごま)
Not a high-protein food on their own, but they complement soy-based proteins and add flavor and minerals.
Beans and Lentils
Adzuki beans (小豆) and other legumes are used in both savory and sweet Japanese dishes, contributing additional protein.
How to Combine Proteins for Balance
Japanese meals often include a variety of protein sources in small amounts, creating a natural balance. Examples include:
- Miso soup with tofu
- Rice topped with natto
- Side dishes featuring edamame or sesame seeds
This combination ensures a wide range of amino acids and nutrients.
Conclusion
Japanese cuisine provides an impressive selection of plant-based protein sources. From tofu and natto to soy meat and koya dofu, each ingredient offers unique textures, flavors, and health benefits.
By combining these traditional foods, you can enjoy a nutritious, balanced vegan diet while experiencing the authentic taste of Japanese cooking.