A Japanese professor is sounding the alarm over a strange problem that the country could be facing in the distant future wherein, due to a law requiring married couples to use a single surname, everyone will eventually wind up with the last name Sato. The odd demographic issue was reportedly uncovered by Tohoku University's Hiroshi Yoshida, who was enlisted by a group looking to change the regulation on surnames. Studying at current statistics, the professor found that there was a 1.0083% increase in Satos from 2022 to 2023. Extrapolating forward using that rate and assuming that the law does not change, Yoshida indicated that half the Japanese population will have the surname by 2446 and the entire country will be be named Sato just 85 years later.
More on this weird story at the Coast to Coast AM website.