Finely chop the shiitake mushrooms and green onions. Moisten the panko with a little water (until it resembles the consistency of okara).
Add the ground pork, mushrooms, onion, ginger, katakuriko, panko, salt and soy sauce into a bowl and blend together.
Turn the mixture out onto a chopping board and shape into a large rectangle and cut into your desired size.
Add a thin layer of vegetable oil (not listed) to a frying pan and put over the heat. Add the patties and cook on a high heat until browned. Turn them over, add 50 ml hot water to the pan and cover with a lid. Steam the patties on a high heat until the liquid has almost all evaporated and they have turned a nice brown colour.
Serve with some mustard soy sauce and eat whilst hot!
Story Behind this Recipe
I tried making chicken patties at first but I couldn't really get the knack of it so decided to try substituting chicken with pork.
Form the patties into whatever size and shape you like.