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Freshly grated wasabi in a small mound
  • Spice
  • 山葵

Wasabi

Heat in the nose, gone just as fast.

Flavor profile

Heatbite 70%
Grassgreen tone 45%
Bitternessbitterness 20%

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

Wasabi is the hardest spice in the family to actually get hold of: nearly everything sold under the name is horseradish with mustard and green coloring. The real plant is grated on a piece of ray skin or a fine metal grater, because the heat only forms when the cells rupture, and it starts to disappear almost immediately. That is why it is grated at the table in the places that have it, and it is also why it must never boil.

Sensory analysis

Pyramid and character

Aroma

from the jar

  • green sharpness
  • mustard
  • earth

Taste

on the tongue

  • bite
  • faint sweetness
  • green

Finish

what lingers

  • short
  • cooling
  • clean
HEATTINGLECITRUSAROMA STRENGTHBITTERNESSHEAT TOLERANCE

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

Kinship
Eutrema japonicum, formerly Wasabia japonica, in the crucifer family together with horseradish and mustard
The compound
allyl isothiocyanate, which only forms when the cells rupture during grating and is volatile; the heat flares up in the nose and rinses away with food or drink
Grating
traditionally grated on an oroshigane, a grater of ray skin or fine metal, in a slow circular motion
Cultivation
the Izu Peninsula in Shizuoka and Nagano are the famous areas, along with Iwate and Shimane; the plant demands running, cool water
Confusion
what is called kona-wasabi is a powder of horseradish and mustard oil, and that is the product on most sushi trays outside Japan

At the table

Use

Dosage
a dab at a time; the heat cannot be built up in advance
Timing
grated and used within minutes, never in a hot pot
Note
the heat peaks just after grating and then fades, so grate it last of all and do not stir it into the soy sauce if it is meant to be noticed

Keep exploring

Related in the Zukan

Evidence

Sources

  1. Wasabi (Wikipedia) (retrieved 2026-08-12)