Karōshi, literally "overwork death," was first diagnosed as a "circulatory disease brought on by stress" in the late 1970s after the 1973 oil crisis, which took a toll on the post-war reconstruction of Japanese industry. Since then, the number of deaths from overwork has increased, especially at larger and more prestigious companies. In 2002, Kenichi Uchino, a 30-year-old quality-control manager at Toyota, collapsed and died after working over 80 hours unpaid overtime for six months. After this incident, Toyota announced it would begin monitoring their workers' health and pay for all of their overtime hours.