Looks similar to katsu pork
Over heat in sauce pan
1/2 c Sugar
1/2 c Sake
1/2 c Soy
1/4 mirin or rice wine vinegar
1 C water
reduce 30 minutes
Sliced onion
Pieces of chicken
Stew 10 minutes
Crack beaten egg and drizzle in . Not overly beaten
Cover and cook 8 miutes or so
Add chives and mushrooms
Top with ginger and nori (seaweed) julienne strips