noun
sweet eel sauce; thick soy-based glaze
A thick, sweet-savory sauce made by reducing soy sauce, mirin, sugar, and sometimes eel broth. Brushed onto grilled eel (unagi) or other sushi toppings.
うなぎの蒲焼きには煮詰めをたっぷり塗る。
For grilled eel, brush on plenty of sweet eel sauce.
この煮詰めは醤油とみりんを煮詰めて作る。
This sweet eel sauce is made by simmering down soy sauce and mirin.