Creating Juicy Japanese Chicken Yakitori is easy when you follow these simple steps:

1. Prepare the Marinade: In a bowl, combine soy sauce, sake, mirin, brown sugar, minced garlic, grated ginger, and sesame oil. Whisk until well blended.
2. Cut the Chicken: Slice the chicken thighs into bite-sized pieces for even cooking.
3. Marinate the Chicken: Place the chicken pieces in the marinade, ensuring they are well coated. Cover and refrigerate for at least 30 minutes.
4. Preheat the Grill: Preheat your grill or grill pan over medium-high heat.
5. Assemble the Skewers: Thread the marinated chicken pieces onto the soaked bamboo skewers. Leave a little space between each piece for even cooking.
6. Grill the Skewers: Place the skewers on the grill and cook for about 15-20 minutes, turning occasionally. Cook until the chicken is fully cooked and has grill marks.
7. Baste with Marinade: During the last few minutes of grilling, brush the skewers with leftover marinade for added flavor.
8. Garnish: Once cooked, remove the skewers from the grill and let them rest for a few minutes. Garnish with chopped green onions before serving.

These steps will guide you in creating Juicy Japanese Chicken Yakitori effortlessly.