The Japanese tend to be more prone to death from overwork than people in other countries. They even have their own term for it, karoshi. The Japanese have a well-known allegiance to their companies, which treated them well. While this may be changing, historically, this has been the case. In other countries, such as the United States, there has been a trend towards a work and family balance.
The hard work of the Japanese is a stereotype, but there are people who work hard in other countries, too. People have different standards of what's normal and what's not. Just because the Japanese people work hard doesn't mean that they don't have the coping skills to deal with how hard they work.
The Japanese are not biologically more prone to death from being overworked than other nationalities. However, Asian cultures do tend to create more stressful environments (e.g. based on familial expectations, primarily) that could result in people in Asian countries working harder and longer than their counterparts in North America, Europe, or even South America.
Japanese are not more prone to death by overwork than people in other countries. This is just a foolish based narrative to compare us to Japan in an effort to lower the number of hours people actually have to work. Since the inception of unions, there has been a movement to work the least possible amount of hours while earning the highest maximum wage.