Teachers and officials at elementary, junior high and high schools across Japan are working more than 11 hours per day on average, raising concern about serious health repercussions or even deaths, a government survey showed Tuesday.Senior staff such as vice principals were found to have worked particularly long hours, with their daily average standing at about 12.5 hours.This means they worked 4.5 extra hours per day, or 90 hours per month, well over the 80-hour monthly overtime threshold, beyond which the risk of "karoshi" or death from overwork, could increase.In the survey which drew re…READ FULL ARTICLE