500g boneless chicken thighs
4 spring onions (use the thick white and pale green parts)
8–10 wooden skewers
100ml soy sauce
100ml mirin
50ml sake
3 tbsp soft brown sugar
1 garlic clove, crushed
1-inch piece fresh ginger, sliced
1 tbsp sea salt
½ tsp white pepper
1 tbsp vegetable oil
Shichimi togarashi (Japanese seven spice blend)
Finely sliced spring onion greens
Lemon wedges
Sanshō pepper (if available)