Myeongdong Gyoja - Seoul

In Korea, they Replace the Z with a J
Not gyoza, but gyoja.  We heard this was the place to be for dumplings in Seoul.  Judging by the line and the fact that so many were willing to wait in it through bitter cold, I expected good things.  The place runs like an efficient assembly line.  You're given a table and a menu and they take you order and your money without leaving your side.  About three minutes later, ta-daaaaaaaaa.

Eton - Brooklyn

Holy Juicy Dumplings, Batman!
I should no longer be surprised. I mean, come on - the best cheeseburger I've ever had was in Tokyo. Still, I was shocked at how juicy and delicious the dumplings were at Eton, a hole in the wall spot smack in the middle of leafy, brownstone Brooklyn. You can get good dumplings off Smith Street in Brooklyn? Yes, you actually can.

Harajuku Gyoza House - Tokyo

Bullseye!
This is a well-known place in Tokyo for gyoza and I can see why. They focus on doing one thing and doing it well. Even at 11pm there was a queue to get in, but it was worth the wait.