- Preheat oven to 375ºF. Heat oil over medium-high heat in a large oven-safe skillet or Dutch oven. Add chicken cubes and lightly brown for 6 minutes, stirring occasionally. Chicken does not have to be fully cooked at this point.
- Stir together teriyaki takumi sauce and chicken stock in a separate bowl. Add rice, broccoli, mushrooms, bell pepper, zucchini, and baby corn to skillet. Pour in sauce and stir well. Cover with lid or aluminum foil and transfer to oven for 20 minutes.
- Serve hot garnished with green onion.