Natto & Shirasu Oroshi-ae: The Ultimate Gut-Health Superfood Recipe

Natto & Shirasu Oroshi-ae: The Ultimate Superfood Topping

Natto is currently exploding in popularity worldwide. No longer just a “unique Japanese delicacy,” it is now recognized by wellness experts and biohackers as a premier superfood. This recipe for Natto & Shirasu Oroshi-ae (Grated Radish with Fermented Soybeans and Whitebait) is the perfect introduction for beginners. It is incredibly simple to make but offers a nutritional profile that is hard to beat.

Why is Natto Trending Worldwide?

1. The “Gut Health” Revolution

In the global wellness community, gut health is a top priority.

Dairy-Free & Resilient Probiotics: Natto is a standout dairy-free probiotic food. While many probiotics are derived from milk, Natto-kin comes from fermented soybeans and is uniquely resilient, often referred to as a “super-probiotic” due to its ability to survive the journey to the gut.
Resilient Bacteria: Unlike many other probiotics, Natto bacteria are highly resistant to stomach acid, ensuring they reach the gut alive to support your microbiome.

2. The Rare Power of Vitamin K2

Natto is one of the world’s richest sources of Vitamin K2 (specifically MK-7).

The Calcium “Commander”: Vitamin K2 acts as a traffic controller, directing calcium into your bones where it belongs and keeping it out of your arteries (preventing calcification). This makes it essential for both bone and heart health.

3. Sustainable “Umami” Protein

As the global shift toward plant-based diets accelerates, Natto is being rediscovered as a high-quality “clean protein.” Unlike highly processed meat substitutes, Natto allows you to consume the full nutritional benefits of the whole soybean with minimal processing.

It is concentrated with the bold, deep Umami that only fermentation can produce. This complex flavor profile is highly regarded by food enthusiasts who appreciate the depth of aged and fermented foods.

Recipe: Natto & Shirasu Oroshi-ae

A refreshing, enzyme-rich dish that balances the stickiness of natto with the crispness of daikon.

🛒 Ingredients (2 Servings)

Natto: 100g (typically 2 small packs)
Shirasu (Whitebait): 10g
Daikon Radish: 100g
Green Onion: 10g (finely chopped)
Mentsuyu (2x Concentrated): 10g (approx. 2 tsp)
- Note: If your natto pack doesn’t include sauce, double the amount of mentsuyu.

🍳 Cooking Instructions

Prep the Radish: Grate the daikon. Lightly squeeze out the excess bitter liquid, but keep it moist and “juicy.”
Whisk the Natto: In a separate bowl, mix the natto vigorously with its included sauce until it becomes frothy. This aeration improves the texture and flavor.
The Flavor Base: In a medium bowl, combine the grated daikon, shirasu, and mentsuyu. Mix these first so the radish absorbs the seasoning evenly.
The Final Mix: Fold the natto into the radish mixture.
- Pro Tip: Always season the radish before adding the natto. Adding natto too early can make the flavor distribution uneven due to its sticky texture.
Garnish: Top with chopped green onions and serve.

💡 How to Serve

This “Oroshi-ae” is incredibly versatile. Because the daikon radish helps neutralize the strong aroma of natto, it is perfect for those trying it for the first time!

Rice Bowl: Serve over hot steamed rice.
Noodle Topping: Mix into chilled Udon or Somen for a refreshing summer meal.
Tofu Topping: Spoon over cold silken tofu (Hiyayakko).
Fusion Style: Try it as a topping for Toast, Pasta, or even a green salad!

📊 Nutrition Facts (Per Serving)

Calories	Protein	Fat	Carbs	Salt Equivalent
119 kcal	10 g	5.1 g	10.6 g	1.3 g

🏠 Homemade Mentsuyu (Noodle Soup Base)

If you cannot find bottled Mentsuyu, you can easily make this “all-purpose” Japanese seasoning at home. It keeps in the fridge for about one week.

Ingredients:

400g Water
20g Dark Soy Sauce
20g Light Soy Sauce
30g Mirin
5g Dashi stock granules

Directions: Combine all ingredients in a pot and bring to a boil. Let it cool completely before storing in a clean, airtight container.

For more information on the benefits of fermented soy, check out our related article: [What kind of foods are natto and soybeans?] (What kind of food is natto?)

📖Read the Japanese version of this article here! [納豆としらすのおろし和え：世界が注目する究極のスーパーフードレシピ]　　

naokoan

Hi, I’m Naoko! I am a licensed Registered Dietitian in Japan, currently working in a hospital setting. My daily mission is to provide nutritious, healing meals to patients, ensuring that every dish supports their health and brings a smile to their face. My recipes are more than just cooking guides—they are built on scientific nutritional balance and clinical experience. Why I provide ingredients in grams (g): You might notice that all my recipes use precise gram measurements. This is because, as a dietitian, I believe that accuracy is the key to true health management. Whether you are tracking calories, managing salt intake, or simply want to recreate the exact flavor of a professional hospital kitchen, these measurements ensure your success and well-being. My Specialty: I specialize in high-pressure cooking and oven recipes that save time without sacrificing nutrition. My goal is to introduce the world to “Real Japanese Home Cooking”—dishes that are simple, budget-friendly, and body-friendly. I’m thrilled to share the wisdom of Japanese nutrition with you. Let’s cook our way to a healthier life!