`` I think there are two reasons why `` karoshi '' is prevalent in Japan -- a hard-working tradition and very weak laws and regulation in the workplace , '' he told CNN . 24 % among Tokyo Telecom employees since the end of 2009 . Recession means there is more chance of employees suffering from depression . In Japan there are more than 300 annual cases of ` ` resulting from overwork ''
24 % among Tokyo Telecom employees since the end of 2009 . Recession means there is more chance of employees suffering from depression . In Japan there are more than 300 annual cases of ` ` resulting from overwork ''