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Natto Substitute: 6 Options by Use Case

Natto provides three things at once: deep fermented umami, sticky polyglutamic acid threads (neba-neba), and live probiotic bacteria. No single substitute replicates all three. The right substitute depends on which property matters most for your dish — fermented flavor, sticky texture, or probiotic intent. This page gives you a specific substitute for each application: natto gohan, miso soup, pasta, and more.

For full natto preparation technique and topping guide → How to Use Natto. This page covers substitutes organized by use case.

Updated

Choose by application

  • Substituting in natto gohan (rice bowl)? Fermented black beans (douchi) for flavor, or okra for texture
  • Substituting in miso soup? Silken tofu + extra miso paste
  • Substituting in pasta or fried rice? Crumbled, sautéed tempeh
  • Want neba-neba texture only? Sliced raw okra or grated yamaimo
  • Want the probiotic benefit? Kimchi (different flavor, similar gut bacteria intent)

Why Natto Is Hard to Substitute Exactly

Natto delivers three properties simultaneously, and each comes from a different source:

  • Fermented umami — produced by Bacillus subtilis breaking down soybean protein into amino acids (especially glutamic acid). This is the deep, savory, slightly ammonia-tinged flavor.
  • Sticky threads (neba-neba) — polyglutamic acid (PGA) polymers secreted by the bacteria. No other common food produces this exact substance.
  • Live probiotic bacteria — Bacillus subtilis spores, which survive stomach acid and colonize the gut. Different from the lactobacillus found in yogurt or kimchi.

Most substitutes address one property well and the others poorly. The key is choosing based on which property matters most for your specific recipe.

Quick Reference: Substitutes by Application

  • Natto gohan (flavor focus): fermented black beans (douchi) — 40g per bowl, chopped finely. Closest fermented umami match.
  • Natto gohan (texture focus): raw okra — 3–4 pods, sliced crosswise. Same neba-neba without fermented flavor.
  • Miso soup: silken tofu + extra miso — 50g tofu + 1/2 tsp miso per serving. No threads, similar protein and umami.
  • Natto pasta / fried rice: crumbled tempeh — 50g per serving, sautéed 2–3 minutes. Firm, fermented, umami-rich.
  • Probiotic intent: kimchi — same serving size. Different flavor but similar gut health purpose.
  • Pure umami boost: extra miso paste — 1/2 tsp per serving. No texture, no threads, just deep savory depth.

Fermented Black Beans (Douchi): Closest Flavor Match

Douchi (豆豉) are Chinese fermented black soybeans — small, wrinkled, intensely savory. They are the closest flavor substitute because they undergo a similar soybean fermentation process (though with Aspergillus rather than Bacillus).

How to use: rinse douchi lightly under running water to remove excess salt (they are heavily salted for preservation). Chop finely and use 1 tablespoon (about 15g) per serving as a rice topping. For a natto gohan substitute: top hot rice with chopped douchi, a raw egg yolk, sliced green onion, and a drizzle of soy sauce.

Flavor profile: deep, funky, salty umami with a slight bitterness. More concentrated than natto — use less. Does not have threads or stickiness.

Where to buy: Chinese grocery stores in the dried goods or condiment aisle. Brands: Yang Jiang, Pearl River Bridge. Also available on Amazon.

Tempeh: Best for Natto Pasta and Fried Rice

Tempeh is Indonesian fermented soybean cake — soybeans bound together by Rhizopus oligosporus mold into a firm, sliceable block. The fermentation produces a nutty, earthy, slightly mushroom-like flavor.

How to use: crumble 50g tempeh per serving and sauté in 1 teaspoon sesame oil for 2–3 minutes over medium-high heat until golden. Toss with hot pasta and 1 tablespoon mentsuyu (the same sauce used in natto spaghetti). The sautéed tempeh provides fermented depth and satisfying protein in a drier, more textured form.

Limitations: tempeh is firm, not soft or sticky. It works where you want fermented bean character without the neba-neba threads. For natto gohan where the soft, gooey bean is the point, tempeh is not a convincing substitute.

Okra: Pure Neba-Neba Texture Substitute

If the sticky, slimy texture is what you are after — not the fermented flavor — raw okra is the best match. Okra releases mucilage when cut, creating the same neba-neba mouthfeel that defines natto.

How to use: slice 3–4 fresh okra pods crosswise into thin rounds (3mm). Spoon directly onto hot rice. The heat from the rice releases more mucilage, intensifying the sticky texture. Add soy sauce and katsuobushi (bonito flakes) to compensate for the missing umami.

Bonus combination: okra + a raw egg yolk + soy sauce over rice creates an excellent neba-neba don (sticky rice bowl) that stands on its own merits, even for people who enjoy natto.

Kimchi: Fermented Flavor, Different Profile

If your reason for eating natto is primarily gut health (probiotic bacteria), kimchi is the most accessible alternative. Kimchi contains Lactobacillus plantarum and other lactic acid bacteria — different species from natto's Bacillus subtilis, but with similar documented gut health benefits.

How to use: chop 2–3 tablespoons of well-fermented kimchi (at least 2 weeks old, with a sour tang) and mix into hot rice. The spicy, tangy, garlicky flavor is nothing like natto, but kimchi + rice is a deeply satisfying combination in its own right. For natto gohan substitute: kimchi + raw egg yolk + sesame oil + green onion over rice.

When No Substitute Works

For natto maki (sushi rolls with natto filling) or traditional natto gohan where the specific flavor and texture of natto are the entire point, no substitute captures the full profile. The polyglutamic acid threads, the particular ammonia-edged fermented flavor, and the soft bean texture are unique to natto.

If you want the real experience but cannot find natto locally, two options: order frozen natto online (it ships well and thaws perfectly), or make it at home. Homemade natto requires only soybeans, a Bacillus subtilis starter, and 24 hours of incubation at 40–45°C.

Full homemade natto guide → How to Make Natto

Frequently asked questions

What is the closest substitute for natto?

Fermented black beans (douchi) are the closest overall substitute for flavor — they provide a similar deep, funky, fermented umami. For texture (the sticky neba-neba threads), nothing truly replicates natto, but sliced raw okra or grated yamaimo provide a similar mucilaginous quality. No single ingredient replaces both the flavor and texture simultaneously.

Can I use miso instead of natto?

Miso can replace natto’s umami component but not its texture or probiotic profile. Add an extra 1/2 teaspoon of miso paste per serving to boost umami in soups and sauces where natto would have been added. Miso works well as a natto substitute in miso soup (simply use more miso) but fails in natto gohan where the bean texture and threads are the point.

Can I substitute natto with tofu?

Silken tofu can replace natto’s soft texture in miso soup, but it lacks fermented flavor, stickiness, and probiotics. To compensate: add silken tofu plus 1/2 teaspoon extra miso paste per serving for umami, or combine tofu with a small amount of fermented bean paste (doenjang or miso) for a closer flavor match. Firm tofu does not work as a natto substitute in any application.

What is the natto-like texture called and what makes it?

The sticky, stringy texture is called neba-neba (ネバネバ) in Japanese. In natto, it is caused by polyglutamic acid (PGA), a biopolymer produced by Bacillus subtilis bacteria during fermentation. Other neba-neba foods include okra (mucilage), yamaimo/nagaimo (mucin), mekabu seaweed, and natto itself. The underlying chemistry differs — okra’s mucilage is a polysaccharide, not PGA — but the eating experience is similar.

Where can I buy douchi (fermented black beans)?

Douchi is available at Chinese grocery stores, usually in the dried goods or condiment aisle. Look for small, wrinkled black beans in plastic bags or jars, sometimes labeled “fermented black beans” or “salted black beans.” Major brands: Yang Jiang, Pearl River Bridge. Also available on Amazon. Rinse lightly before use to remove excess salt.

Is tempeh a good substitute for natto?

Tempeh substitutes natto’s fermented character and protein content well, but not its texture. Tempeh is firm and sliceable, while natto is soft and sticky. Crumbled, sautéed tempeh (2–3 minutes in sesame oil) works in natto pasta and fried rice applications where you want fermented depth without the threads. It does not work for natto gohan where the soft bean and thread texture are essential.

Can I make a natto-free natto gohan that still tastes good?

Yes, but reframe it as a different dish. Top hot rice with: 1 tablespoon chopped fermented black beans (douchi) for umami + 2–3 sliced raw okra pods for neba-neba texture + a raw egg yolk + 1 teaspoon soy sauce + sliced green onion. This combination approximates three of natto’s key elements (fermented flavor, sticky texture, protein richness) without natto itself. It is genuinely delicious on its own terms.

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