- Combine ingredients for meatballs in a medium mixing bowl and thoroughly mix to combine.
- Use hands or a medium scoop to split meatball mixture into 12 portions, then put on a tray lined with wax paper. Freeze 10 minutes to firm the mixture.
- Heat oil in a medium skillet over medium heat for 2 minutes. Use your hands to shape the 12 portions into meatballs, then add meatballs to pan. Brown for 10 minutes, turning every 3-4 minutes. Add teriyaki takumi sauce to skillet and cover. Lower heat and simmer for 10–15 minutes longer, until meatballs are cooked through.
- Serve meatballs hot, garnished with additional green onion and sesame seeds.