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NeKKo
Dried niboshi, small whole sardines
  • Dashi ingredient
  • 煮干し

Niboshi

Power over finesse, and pull off the heads.

Flavor profile

Umamipowerful umami 75%
Oceanfishiness 65%
Salinitysaltiness 50%
Bitternessbitter edge 40%

The strengths are editorial judgments on a scale within the family, not measurements. They can be compared across the dashi ingredients varieties, not directly against another family.

Niboshi are small fish, most often Japanese anchovy, that have been boiled and then dried whole. They give a stronger, fuller and considerably less elegant broth than katsuobushi: darker in color, distinctly fishy, and carrying a bitterness that comes from the head and the innards. That is exactly why those parts are picked off before steeping, and exactly why niboshi is the standard in everyday miso soup and in plenty of ramen, where power beats finesse.

Sensory analysis

Pyramid and character

Aroma

from the bag

  • dried fish
  • ocean
  • stale edge

Broth

in the spoon

  • powerful umami
  • saltiness
  • fishiness

Finish

what lingers

  • long
  • hearty
  • slightly bitter
UMAMISALINITYSWEETNESSSMOKEBODYCLARITY

Character 0-100 per axis, set relative to the other entries in the same family. An editorial judgment of a typical serving, not measurements.

Background

Facts

Raw material
most often Japanese anchovy; sardine, small fish of the herring family and sand lance also appear
Processing
boiled whole and then dried; the name means roughly boiled and dried
Names
called niboshi in Kanto and iriko in Kansai, but it is the same product
Flavor core
inosinate 350 to 800 mg per 100 g, glutamate 40 to 50 mg (Umami Information Center)
Bitterness
the head and the innards carry the bitterness and the stale note, and are removed before steeping
Use
everyday miso soup, noodle broth and ramen

In the pot

Broth

Soaking
20 to 30 minutes in cold water, preferably overnight in the refrigerator
Method
heat slowly, skim the surface and hold just below the boiling point for 8 to 10 minutes; cold-brewed, the broth turns out clearer and milder
Note
snap off the head and pull out the black innards first, or you will not need to ask why the broth tastes bitter

Keep exploring

Related in the Zukan

Evidence

Sources

  1. Niboshi (Wikipedia) (retrieved 2026-08-12)
  2. Niboshi, Iriko / Dried Sardine (Kikkoman) (retrieved 2026-08-12)
  3. Seafood (Umami Information Center), tabell över umamiämnen (retrieved 2026-08-12)