Yuma Hasegawa's parents began the letter by wishing him a happy 20th birthday—which makes him a legal adult in Japan—but after that, they got down to serious business.
In addition to telling Yuma that he needs to be a "proper and responsible member of society, like [his] father and mother," the Hasegawas also let their son know that he would have to start paying rent and would be charged interest on any money loaned to him.
Not only that, but Mom and Dad also reminded Yuma that his name and picture could be shown on the news if he committed a crime.
And as far as marriage goes, he'd need to run the young woman by them or face the possibility that they might not "emotionally accept" her. Yikes!