More than 40 percent of Japanese "salarymen" fear dying of overwork, a survey showed Wednesday. Of 500 veteran office staff in this workaholic nation questioned by a big life insurance company, 78 percent said they were working more than they should and felt physically tired. One in 10 respondents said he was highly likely to work himself to death, and a further 30 percent saw a chance of dying for the same reason, the survey said.