Soboro Natto with Dried Daikon
Quick answer
- Total time
- 38 min
- Level
- Easy
- Servings
- 4 servings
- Ingredients
- 4
About this dish
Soboro natto is a fermented side dish from central Ibaraki that combines Mito small-bean natto with thick dried daikon, salt, and soy sauce.
Read more
Also called shoboro natto, it arose as a way to keep leftover autumn natto after portions had been shared with neighbors and temples. The radish was traditionally exposed to sun and cold wind for three days and frozen by the final night, producing a firm crunch against the soft beans. This conservative version uses a newly opened commercial natto pack, boils and cools the soy seasoning, blends flavor for only three days at 4°C or colder, and finishes the batch within seven days.
Ingredients
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Instructions
Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.
- 1Heat
Sanitize container, lid, and spatula with boiling water and dry completely; confirm refrigeration at 4°C or colder.
Use unopened natto within date and remove it from the refrigerator only when ready to mix.
- 2Prep
Quickly rinse 300g split-dried daikon twice in cold water and drain 15 minutes.
Without fully soaking, cut to 1cm, spread in one layer on a clean rack, and surface-dry inside the refrigerator for 30 minutes.
- 3Season
Sprinkle daikon with 5g salt, massage 2 minutes with clean gloved hands, and rest 10 minutes.
Bring 30ml soy sauce to a full boil for 1 minute, then cool below 10°C over ice water.
- 4Season
Add the remaining 5g salt to 150g commercial natto and stir vigorously with a sanitized spatula for 2 minutes until white foam and long strings develop. Add daikon and cold soy sauce and mix 1 minute more.
- 5Control
Pack in the sanitized container, cover, and refrigerate immediately at 4°C or colder for 3 days.
Stir once daily with a clean spatula and never leave at room temperature longer than 30 minutes.
- 6Finish
On day 3, serve when daikon is seasoned but remains firm.
Mold, pink or orange discoloration, swollen container, abnormal water separation, or foul odor must not be dismissed as normal natto aroma; discard without tasting. Consume within 7 days from mixing.
Practical Cooking Checks
The cues that matter most while cooking.
- Key technique
- Small-bean Mito natto and thick dried daikon
- Finish cue
- On day 3, serve when daikon is seasoned but remains firm.
- Storage and reheating
- Rinse only and surface-dry under refrigeration to preserve the contrast.
Cooking decision evidence
Calculated Charim data and applicable official cooking and food safety guidance.
This recipe
38min, 4 ingredients
Category median
48min, 8 ingredients
Based on 247 recipes
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