Nankotsu Yakitori

1. Prepare the tare sauce. Combine koikuchi soy sauce, mirin, sake, and granulated sugar in a small saucepan.

2. Bring the tare sauce to a simmer over medium heat, stirring until the granulated sugar dissolves. Reduce heat to low and simmer for 5-7 minutes until slightly thickened. Set aside.

3. Soak the bamboo skewers in water for at least 30 minutes to prevent them from burning during grilling.