bamboo skewers, soaked in water for 30 minutes,
thick half moon slices Japanese sweet potato,
Vegetable oil, plus more for the grill grates,
chicken wingettes,
Kosher salt,
large shishito peppers,
boneless chicken thighs, cut into 1 inch pieces,
spring onion, white and light green parts, but into 1 1/2 inch lengths,
chicken livers, trimmed of white pockets and cut into 1 inch pieces,
Chicken meatballs with teriyaki sauce (Tsukune no teriyaki),
teriyaki sauce,
Shichimi togarashi (Japanese seven spice powder) to taste