Chilled Natto Miso Soup with Skipjack Tuna (納豆の冷や汁; natto no hiyajiru)

Chilled miso soup with the addition of natto and skipjack tuna gives it a nutrition boost and a unique texture. The perfect dish on a hot summer day!

Chilled Natto Miso Soup with Skipjack Tuna (納豆の冷や汁; natto no hiyajiru)
Photographed by Akio Takeuchi

Recipe by
Masahiro Kasahara



Beans & Tofu

Soups & Stews



Calorie count is per serving.
Exlcudes time needed to chill the miso soup.

Ingredients (Serves 2)

  • 100 g skipjack tuna (for sashimi; block)
  • 1 pack natto
  • 1/2 onion
  • 1/3 pack kaiware sprouts
  • A pinch of salt
  • [Miso soup]

    • 600 ml dashi
    • 3 tbsp miso
    • 1 tbsp mirin
    • 1 tbsp sesame oil



Prepare the [Miso soup]. Put the miso and mirin in a bowl, add the dashi and whisk together. Add the sesame oil and refrigerate.


Cut the onion along the grain into thin slices and rub with a pinch of salt. Rinse and squeeze out excess moisture. Cut off the root ends of the kaiware sprouts and cut in half. Lay your knife at an angle to cut the skipjack tuna into 5 mm sogi-giri pieces. Combine the natto with the sauce and mustard that comes in the pack.


Rubbing salt into the onions and then rinsing them removes the bite and bitterness. When slicing tender, sashimi-grade fish, lay the knife at an angle, place the heel of the knife against the fish, and draw the blade towards you (sogi-giri) to prevent the flesh from falling apart.


Put the onions, skipjack tuna and natto in a serving bowl, and cover with the [Miso soup]. Top with kaiware sprouts.