A strong soy based sauce used in Japanese cooking, for example to flavor noodles.

Ingredients

2 parts soy sauce
2 parts mirin
1 part rice wine
bonito flakes

Preparation

1. Combine all of the ingredients in a small pot.  Bring to a boil and simmer briefly.
2. Strain to remove the bonito flakes.
3. May be stored in the refrigerator for a week or more.