Sumo Wrestler in Chinese / Japanese...

力士 literally means “strong man” but is more commonly used as a title for sumo wrestlers.

In Japanese, this is a Rikishi.

力士 is also used in Chinese and old Korean with the same meaning. Occasionally, this will also be used to refer to a strong or mighty man, hero, demigod, etc. But anyone in the CJK world will first think of a sumo wrestler before the more literary usage as a strong man or demigod.