Cut the pork into 3-4cm bite sized pieces and thinly slice the onion.
Heat vegetable oil in a pan and stir-fry the pork. Once it is cooked through, add the onions and cook until tender. Remove the pork and onions from the pan.
Prepare the sauce in the same pan. Add the ingredients labeled ★ and simmer over medium heat until the surface slowly bubbles.
Return the pork and onions to the pan, stir while lightly simmering and you're done. Pour on top of steaming rice and enjoy.
Story Behind this Recipe
My husband is from Hokkaido. When his parents came for a visit, we wanted to serve them pork donburi rice bowls, but we were out of our favorite Tokachi pork donburi rice bowl sauce! So, we made it from ingredients we had on hand. The sweet and salty sauce turned out delicious and we were totally satisfied.
There are many restaurants that use thick pork loin, so it's okay to use that instead. I prefer the juiciness of thinly sliced pork belly. When adding the pork to the sauce, stir lightly while it simmers to keep the pork tender; if the heat is too strong, the pork will become tough. Add as much onion as you like.