Rōbai natural pure rice vinegar made in Ono, Fukui 500 ml

Kawahara Suzō has been making rice vinegar in Ono, a mountain basin city in Fukui Prefecture, since 1823. Ono is known for its exceptionally clean groundwater, most households draw directly from private wells, and that same water forms the backbone of every bottle of Rōbai. The name (老梅, “old plum”) signals what to expect: a gentle, rounded acidity rather than anything sharp or aggressive.

What makes Rōbai unusual is how far back in the process Kawahara’s involvement begins. About a third of the rice is grown by the brewery itself without pesticides or synthetic fertilizers; the rest comes from a small number of trusted organic producers in Ishikawa and Akita. Koji is made by hand in thin layers, which produces the clean, fruity aroma rather than the musty character common in mass-produced rice vinegar. The sake that results is then left to convert to vinegar through static fermentation, a slow, undisturbed process of around three months in which the acetic acid bacteria work at their own pace. The result is a vinegar with smooth, deep acidity that works equally well in sushi rice, a simple sunomono, or a light dressing.