Tyranthraxus posted...
Unless you're in a hard labor camp, people don't die at 63 just from working.
No, but it doesn't help. There are plenty of other factors, but its only recently that mangaka have been allowed to take a break for health reasons, as things like that back in the 90s/early 2000s it really wasn't a thing. If you didn't regularly publish, your work wouldn't get featured. So, it wouldn't surprise me if they were neglecting their personal health at the same time.
A combination of being overworked and neglecting health can lead into issues.