In contrast, "koikuchi” — or the typical all-purpose soy sauce found at most restaurants — has a 50:50 ratio of soybeans to wheat. He added, "Soybeans are a legume that contains a great deal ...

Soy sauce: Japan's JAS (Japanese Agricultural Standards) classify shoyu into five types: White shoyu, usukuchi (light shoyu), koikuchi (dark shoyu), saishikomi (re-brewed and double-fermented shoyu)., ...