sukiyaki stock
A cooking liquid made from soy sauce, mirin, and sugar, used to flavor sukiyaki. Often simply called 割り下.
See also: 割り下
すき焼きを作るときは、まず割り下地を鍋に入れて温めます。
When making sukiyaki, first put the stock in the pot and heat it.
Compound of 割り (wari, 'diluting') + 下地 (shitaji, 'base'). The exact historical derivation is uncertain, but the term refers to a diluted base seasoning for sukiyaki.