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Gomasio

Also known as gomashio, goma shio, sesame salt

Seasoned salt

Quick answer

Toasted sesame seeds lightly crushed with salt. In Japan it is traditionally black sesame sprinkled over sekihan, the red-bean rice of celebrations; the sesame-heavy version sold in Western health-food shops comes from the macrobiotic movement and uses far less salt.

In essentially every version: Toasted sesame seeds, Salt.

2 distinct versions are set out below. None of them is presented as the correct one, because there isn’t one.

What goes in it

The defining core first, then the versions, with what each ingredient is there to do.

Ingredients common across versions
IngredientRoleHow essential
Sesame seedBlack sesame in the Japanese tradition for sekihan; brown or white in most other uses.basedefining
Saltsaltdefining
Why versions differ:

Two things vary: the colour of the sesame and, much more consequentially, the ratio of sesame to salt. Japanese goma shio for sekihan is visibly salty; macrobiotic gomasio uses something like fifteen to twenty parts of sesame to one of salt. The two are not interchangeable spoon for spoon.

Traditional practiceConsistent across descriptions.

The versions

Each attributed, with how firm its proportions are stated plainly.

Japanese goma shio for sekihan

Regional tradition

Japanese household practice · proportions representative · medium confidence

Black sesame toasted and mixed with roasted salt, sprinkled over red-bean rice. Proportions are representative, by volume.

Proportions for Japanese goma shio for sekihan
IngredientPartsShare
Toasted black sesame3–580%
Salt120%

Macrobiotic gomasio

Common today

The macrobiotic diet movement and Western health-food retail · proportions representative · medium confidence

Brown or unhulled sesame toasted and ground in a suribachi with a small amount of sea salt until about half the seeds are crushed.

Proportions for Macrobiotic gomasio
IngredientPartsShare
Toasted sesame seeds15–2095%
Salt15%

SpiceHQ records this ratio as a practice, not as a health recommendation.

Using it

Sprinkled at the table, never cooked. Toasting the sesame just before crushing is what gives it flavour, so small, fresh batches are the norm.

Traditional practiceStandard practice.
Flavour:

Nutty and toasty with a clean saltiness; black sesame adds a slightly bitter, deeper note. Crushing part of the seeds releases their oil and makes the flavour much fuller than whole toasted sesame.

Traditional practiceFollows from the composition and preparation.
Heat:

None.

Culinary conventionNo pungent ingredient.
Suits:
  • Sekihan (red-bean rice)
  • Plain rice and onigiri
  • Steamed vegetables
  • Salads and grain bowls
Traditional practiceThe uses described in Japanese and macrobiotic cooking.

Scaling: Scale by the sesame and add salt to the ratio of the version you want; the two versions differ by a factor of five or more in salt.

What to use it on

Rice

Classic

Black goma shio sprinkled on sekihan, and gomasio on plain rice and onigiri, is its defining use. The toasted sesame gives plain rice a nutty richness and the salt seasons it.

How: Sekihan; Onigiri

Documented in cuisineJapaneseSources: Established culinary practice

Storage

Good for: 1–3 months (typically 2 months)

Conditions:

Cool, dark, dry and closed; in the fridge in a warm kitchen.

Culinary conventionCrushed sesame oil oxidises fast.

Rancid gomasio tastes bad and is best discarded, but it is a quality failure rather than a food-safety one.

Allergens and safety

Allergens:
  • Sesame seeds — a declarable allergen in the EU and US

Sesame seeds must be declared in both the EU and the United States. This is a statement about labelling law rather than about whether allergy occurs — allergic reactions to spices are documented and are not a labelling category — and it is the part of the answer that differs by where the food is sold.

Culture and origin

Origin:

Japan, where goma shio ("sesame salt") is the table seasoning for sekihan and for plain rice and onigiri. The Western form spread through the macrobiotic diet movement in the twentieth century, which promoted it as a lower-salt seasoning with a much higher proportion of sesame.

Traditional practiceThe Japanese use with sekihan and the macrobiotic popularisation are both consistently described.

Japan

Black goma shio on sekihan is part of the food of celebrations — births, birthdays, coming-of-age and festival days — where the red-bean rice itself is the festive dish.

Traditional practiceDescribed Japanese practice.

The macrobiotic movement

Adopted as a characteristic table seasoning of macrobiotic cooking in Europe and North America, where it was promoted as a way to use less salt. SpiceHQ records the practice and makes no claim about its health effects.

Traditional practiceA well-described twentieth-century diffusion.