also: トンカツソース
noun
tonkatsu sauce
A thick, savory-sweet brown sauce used for tonkatsu (breaded pork cutlet), typically Worcester-based with fruit and vegetable purees.
See also: とんかつ
とんかつにはとんカツソースが欠かせない。
Tonkatsu sauce is essential for tonkatsu.
スーパーでとんカツソースを買った。
I bought tonkatsu sauce at the supermarket.