Are most people in Northeast China Japanese?

When Japan occupied the three northeastern provinces, there was an open group, that is, Japanese immigrants, but even this could not change their nature as invaders. Later, some of these people died in battle, most of the rest were repatriated, and a few stayed and gradually integrated into the people of Northeast China. The China government didn't embarrass them. There is also a Japanese prisoner of war left behind. They didn't commit any particularly serious crimes, and they performed well and had professional skills, so they stayed. It is typical that the instructors of the first female civil aviation pilots in China were two Japanese pilots who were captured at the beginning. From this perspective, it should be said that some people in Northeast China are descendants of Japanese.