Death caused by too much hard over-working. This term is from Japanese. Korean and Japanese has this word that can be written in chinese character. Karosi is consisted of 3 chinese character which means over, work and death. If a person's death is identified as karosi, his or her family gets financial help from company or insurance.
Jack : What is the cause his death?
Susan : It's karosi.
Jack : In US, people don't acknowledge karosi.
Susan : Well, it's japanese company. So,...
Jack : Good for his family. As a friend of his, I am glad to hear that.