First, add the 1 cup panko breadcrumbs and 1 cup milk and let it soak for 5 minutes.

After cutting up the onion add to a saucepan with the 4 tablespoons butter and allow the ion to cook for about 5 minutes, then add the garlic and cook for 1 more minute.

Then remove from skillet and allow to cool at room temp.

Add the pork, beef, salt soy sauce, eggs, and cooked onions into a big mixing bowl and panko/milk mixture and mix together.

Make burger-size ball shapes into 8 equal parts or if you want smaller burgers you can do 10.

Add oil back to the skillet gently play the patties about 1 inch thick and press down a thumb impression into the center.

Cook over medium heat and cook for 6 minutes on one side and 6 minutes on the other side. Make sure to cook completely through.

Use a thermometer at 155° or no pink shows through.

For the sauce, after all the burgers are cooked in the same saucepan add the sake. Swirl the sake for about 30 seconds and make sure to scrape the bottom of the pan (this way you get the meat flavor in the sauce and it deglazes the skillet).

Then add the Worcestershire sauce sauce and ketchup and cook for about 1 minute until sauce constancy.