Shake all ingredients in ziplock bag or jar, and refrigerate.
Thinly slice beef flank steak into 2-inch by 2-inch pieces.
Marinate sliced beef in a ziplock bag or sealed tupperware in the fridge. NOTE: For beef (or chicken) marinate 2 hours for best flavor. Marinating for longer than 4 hours will result in meat that might be too salty, given the potency of the soy sauce. For fish, I recommend only marinating for 30 minutes to 1 hour. This marinade can also be brushed on to burgers.
Skewer several pieces of beef on to the bamboo stick/skewer.
Grill on the BBQ until medium-well.
Recipe by Bebe Love Okazu at https://bebeloveokazu.com/2012/10/15/korean-style-marinade-beef-kabobs/