Andrew Draper says he knew Pres Trump while Trump was at MIT studying Mathematics and Physics in his Uncle Dept. He said Pres Trump was in his element there.
He also said Pres Trump had a Japanese Roommate . I think he was called Youtiotakahama and that Pres Trump learned to speak fluent Japanese- so it may have something to do with that but I think this chap is Korean

There was a YT video knocking around about it for years.