A Yale professor suggested that Japan's old people should kill themselves in a mass suicide, and it made him a celebrity

• A Yale professor said in an interview that mass suicide could solve Japan's aging population issue.
• His controversial opinions have made him popular with Japan's youth, per The New York Times.
• Yusuke Narita now has a large social media following and even appeared in an energy drink advert.

A Yale professor who suggested that mass suicide could be the solution to Japan's aging population has gained celebrity status among the country's youth, even appearing in an advertisement for energy drinks, The New York Times reported.