Sunomono

Vinegared dishes are called sunomono as su means vinegar in Japanese. Sunomono has a refreshing taste and goes with many types of dishes. It's a good side dish or an appetizer to serve in a Japanese-style meal. Sunomono also helps to enhance appetite.
There are mainly three types of vinegar dressings for sunomono:

Ama-zu (sweet vinegar mixture)
Vinegar / Sugar / Salt
Mix and heat 2 parts vinegar, 1 part sugar, and some salt.
Nibai-zu
Vinegar / Soy Sauce
Mix equal amounts of vinegar and soy sauce.
Sanbai-zu
Vinegar / Soy Sauce / Mirin or Sugar
Mix and heat equal amounts of seasonings. *The amount of sugar is about one third of mirin.

Dashi stock is often added in nibai-zu and sanbai-zu to soften the flavor. Adjust the amounts of seasonings, depending on your preference and ingredients.