Cut the meat into very thin slices (ask butcher if they can cut the meat into thin slices about 1/4 inch thick). If using chicken, flatten it out a bit by using a mallet.
Combine the shoyu, water, sugar, and garlic; mix well until sugar has dissolved. Add meat to the marinade and cover with a plastic wrap or towel. Let it marinade in the fridge for 1-2 hours.
After the meat has marinated, whisk eggs in a large bowl. Add enough flour to a plate to dredge the meat in.
Heat and oil a non stick pan over medium heat. Dredge the meat first in flour, then cover it in the whisked eggs. Quickly transfer the meat to the pan. Repeat the same process until the pan is slightly full.
Cook the meat for 1-2 minutes or until the bottom becomes lightly golden brown. Flip and cook for another 1-2 minutes. Remove from the pan after all sides have been cooked.