white vinegar; plum vinegar without perilla
Refers to a light-colored vinegar, either a standard white vinegar or a type of plum vinegar (umezu) made without red perilla (shiso), which keeps it pale. Compare with ホワイトビネガー (Western white vinegar) and 梅酢 (umezu, often red from perilla).
Using white vinegar in this recipe gives a nice, clean color.
When making umeboshi, if you don't add red shiso, you get white plum vinegar.
vinegar-based dressing with dashi, sesame, tofu, sugar, and salt
A traditional Japanese dressing (sometimes called 白酢あえ or 白酢和え) made by thinning vinegar with dashi and blending in ground sesame, tofu, sugar, and salt. Used for dressing vegetables and other ingredients.
I dressed spinach with shirozu to make a light side dish.
Compound of 白 (shiro, 'white') and 酢 (zu, 'vinegar'). The term likely arose to distinguish pale vinegars from darker or red-tinted varieties.