Prep and get ready all the individual ingredients. Prepare the onions, grated ginger, and ginger juice. Set aside.
Slice the pork to about 3-4mm thick slices. Place the pork in a bowl, and add the 1 tsp ginger juice and 2 tsp of sake marinade. Mix the marinade evenly, then set aside to rest for about 5-8 minutes.
In a separate bowl, add all the ingredients for the ginger sauce. Mix thoroughly.
Heat 1 tbsp of oil in a nonstick pan on medium high heat.
Dredge the pork with the flour, making sure all sides are coated. Then shake off the excess, then sear the pork slices on each side for 3 minutes. Remove from the pan.
Add 1 tbsp of oil to the pan and stir fry the sliced onions for about 5 minutes. Add the pork slices back to the pan.
Pour the ginger sauce and mix thoroughly. Once all the pork pieces are coated with the sauce, stir fry that for a minute or two.
Add 1/2 cup of water, and mix the shogayaki well. Reduce the heat to medium, close the pan lid, and steam for another 5 minutes. If the dish doesn't have enough sauce, just add a bit more water at 1/4 cup increments.
Serve with steamed rice, grated cabbage, steamed broccoli, tomatoes, and miso soup for a complete meal.