In a medium bowl, whisk together the soy sauce, rice vinegar, sugar, sesame oil, ginger, and garlic until the sugar is dissolved and the ingredients are well incorporated.
Transfer the sauce to a serving bowl or individual dipping dishes.
Serve with any tempura dish.
Interesting Facts
Tempura is a Japanese method of deep-frying food that originated in the 16th century.
Tempura dipping sauce is also known as tentsuyu.
The sauce is traditionally served cold or at room temperature.