The pork flavor combined with sweet, salty teriyaki and the tanginess of pickled sweet onions is so satisfying!

Mix all ingredients (except the extra 2 tablespoons of teriyaki sauce) until just combined and form into 4 patties.
Cook in a pan over medium high heat until brown and internal temperature is 165 degrees Fahrenheit.
Add the remaining 2 tablespoons of teriyaki sauce to the pan and continue cooking, spooning over burgers until sticky.
Serve on buns toasted with garlic butter and top with pickled onions, Japanese mayo, lettuce and tomatoes.