Oyakodon
Oyakodon is a portmanteau of oyako and donburi, a Japanese rice bowl. Oyako means “parent and child”, so the ingredients of oyakodon are chicken and eggs. Chicken and sliced onion are cooked with fish broth, soy sauce, sugar, and mirin (rice wine) in a flat-bottomed pan that is used specifically for oyakodon. Raw eggs are beaten and added into the pan, then this is served over a bowl of rice before the eggs become hard.
There is tanindon in Kansai, the western part of Japan around Osaka. “Tanin” literally means “not parent and child”, so the ingredients of tanindon are not chicken, but pork or beef. I prefer oyakodon as I like the texture of the soft chicken with warm, fluffy eggs.