Make the Dough
In a medium bowl, mix glutinous rice flour and regular rice flour.
Gradually add warm water while kneading until the dough is smooth and pliable.
Shape the Dumplings
Divide the dough into 24 equal portions.
Roll each portion into a ball approximately 2-3 cm in diameter.
Cook the Dumplings
Bring a pot of water to a boil.
Add the dumplings to the boiling water. When they float to the surface, let them cook for another 2 minutes.
Transfer the cooked dumplings to a bowl of cold water to cool.
Assemble the Skewers
Thread 3 dumplings onto each skewer.
Pat the skewered dumplings dry with a paper towel.
Grill the Skewers
Heat a non-stick pan over medium heat. Grill the skewered dumplings until lightly browned on all sides.
Prepare the Glaze
In a saucepan, combine soy sauce, sugar, mirin, and water.
Bring the mixture to a simmer. Add cornstarch slurry (1 tsp cornstarch mixed with 1 tbsp water) if a thicker glaze is desired.
Cook the glaze for 2-3 minutes, stirring frequently, until slightly thickened.
Coat the Dumplings
Brush the grilled dumplings generously with the glaze.
Serve and Enjoy
Serve the Mitarashi Dango warm for the best flavor.