- Soy sauce type
- 淡口醤油
Usukuchi
Pale in color, saltiest of them all.
Flavor profile
The strengths are editorial judgments on a scale within the family, not measurements. They can be compared across the soy sauce varieties, not directly against another family.
Usukuchi is Kansai's pale soy sauce, brewed since the 1600s in Tatsuno in Hyogo for kitchens where the ingredients must keep their color. The name means light mouth and refers to the color, not the strength: usukuchi is saltier than koikuchi, around 19 percent against 18. Whoever swaps one for the other and salts as usual gets a salinity slap, and that confusion is the whole reason to know the type.
Sensory analysis
Pyramid and character
Aroma
from the tub
- light ferment
- grain
- clean
Taste
on the tongue
- salinity
- light umami
- mild sweetness
Finish
what lingers
- short
- clean
- salty
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
- Confusion
- light means light in color, not mild; usukuchi runs about one percentage point higher in salt than koikuchi, and is dosed accordingly
- Salt
- around 19 percent, the saltiest of the five types
- Origin
- Tatsuno in Hyogo, where the brewing is documented since 1666; Hyogo remains the second-largest producing prefecture
- Method
- brewed to stay pale, with a lighter koji run and sometimes amazake in the mash; in soy sauce brewing color follows time and heat, so the paleness is an active choice
- Use
- the kitchen soy sauce of Kansai and Kyoto, for clear soups, simmered vegetables, and everything where the dashi and the ingredient's color must show
- Proportion
- around 14 percent of production, second after koikuchi
In the kitchen
Use
- Dosage
- less than koikuchi for the same salinity; season toward the end in clear dishes, where every gram shows
- Timing
- goes into the food, not onto the table; usukuchi is a kitchen sauce, not a dipping sauce
- Note
- pale soy sauce oxidizes faster than dark; buy a smaller bottle, keep it refrigerated, and expect the color to darken with time
Evidence
Sources
- Soy sauce (Wikipedia) (retrieved 2026-08-15)
- 醤油 (japanska Wikipedia) (retrieved 2026-08-15)
Compiled by Basim Ali Yoshiguchi. .