Nikujaga is one of the most popular Japanese dishes cooked at home.
It’s made by simmering potatoes, onions, and meat in a mixture of soy sauce, mirin, and sake until the potatoes are nice and tender. The kind of meat depends on the family- in general, pork is more common in eastern Japan while beef is preferred in the west. As for me, I like using beef, even though I live in the east!