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Low Carb Japanese Soba

The BEST Asian Low-Carb/Keto recipe for Low Carb Japanese Soba. Enjoy this delicious meal at only ~8g Net Carb / Serving. Step by step directions with pictures makes this recipe quick and easy.
Course Main Course
Cuisine Japanese
Keyword keto cold noodles, keto japanese noodles, keto japanese soba, low carb cold noodles, low carb Japanese noodles, low carb Japanese soba
Prep Time 5 minutes
Cook Time 5 minutes
Total Time 10 minutes
Servings 2
Calories 627kcal


  • 4 oz Edamame Noodles
  • 1/3 Cup Japanese Sake
  • 1/4 Cup Soy Sauce
  • 2 tbsp Monkfruit Erythritol Blend
  • 1 1/2 Cup Bonito Flakes
  • 2 1/2 tbsp Cold Water add more water for lighter sauce
  • 1 Stalk Green Onion
  • 1/2 Inch Ginger


  • Gather all the ingredients.
    Low Carb Japanese Soba Recipe (44)
  • Boil about 3-4 cups of water in a stove top pot.
    Low Carb Japanese Soba Recipe (24)
  • While waiting for the water to boil, in another stove top pot, add Japanese Cooking Sake, Soy Sauce, Monkfruit Erythritol Blend and bring to light boil. Once lightly boiling, reduce heat to simmer, mix in Bonito Flakes and simmer for 1 minute. Once 1 minute has passed, remove from heat and set aside. This will be your 'mentsuyu' or concentrated dipping sauce.
    Low Carb Japanese Soba Recipe (20)
  • Finely slice green onions and transfer to serving plate.
    Low Carb Japanese Soba Recipe (8)
  • Grind down ginger with grater and transfer to serving plate.
    Low Carb Japanese Soba Recipe (45)
  • Once water is boiling from step 2), add Edamame Noodles and follow cooking instructions indicated on package (ours required to steep in boiled water for 4 minutes). Once cooked, use a strainer and wash in cold water. Transfer to serving plate.
    Low Carb Japanese Soba Recipe (40)
  • Using a strainer, strain mentsuyu sauce into a bowl and use a spoon to push out any excess sauce from the Bonito Flakes. Next, mix 2 1/2 tbsp of cool water into the concentrated dipping sauce and split sauce equally among servings. Note - if you would like a lighter sauce, add more water and visa versa.
    Low Carb Japanese Soba Recipe (43)
  • To enjoy, add selected toppings into the mentsuyu dipping sauce and mix well. Then take a little bit of the noodles, dip into the dipping sauce and enjoy! A perfect cool dish for hotter months coming up!
    Low Carb Japanese Soba Recipe (46)



Calories: 627kcal | Carbohydrates: 9g | Protein: 122g | Fat: 1g | Saturated Fat: 1g | Cholesterol: 119mg | Sodium: 2095mg | Potassium: 1603mg | Fiber: 1g | Sugar: 1g | Vitamin A: 60IU | Vitamin C: 1mg | Calcium: 6mg | Iron: 1mg