Place 8 wooden skewers in a large baking dish filled with hot water. Soak for at least 30 minutes.
The Sauce:
In a small saucepan, whisk together the rice vinegar, water, soy sauce, canola oil, brown sugar, flour, garlic and ginger.
Bring to a boil over medium heat and cook, whisking frequently, until the sauce is slightly thickened, about 3 minutes.
The Shrimp:
Preheat the grill to medium-high heat.
Place the shrimp and green onion pieces into a large bowl and toss with the canola oil, salt and pepper.
Alternately thread the shrimp and green onion pieces onto the skewers.
Place on the grill and cook until the shrimp is just cooked through, about 1 minute per side. Take care not to overcook the shrimp or it will become rubbery.
Place the skewers on a serving platter and brush with most of the teriyaki sauce. Serve with extra sauce for drizzling or dipping.
Notes
From the kitchen of Cookin' Canuck | cookincanuck.com