Kirareyaku is the Japanese term for "sliced up actor." It is used to refer to actors who are specialists at dying in movies, generally action movies. If a director needs an actor who is good at doing a death scene, as in particularly adept at getting smashed, chopped, shot, electrocuted, what have you, they call for a kirareyaku.
Seizo Fukumoto is one of the most famous kirareyakus.
Source: cnn.com