In the spring of 2015 Matsuri Takahashi, 24, joined the Dentsu advertising agency, one of the Japan’s most prestigious but demanding corporations, as a young recruit. Within a few months she was complaining to friends how exhausted she was. “I want to die” she confided in a social media message to friends. And on Christmas day in 2015 she did just that, throwing herself from the roof of the company dormitory were she lived.