Sport whose athletes may earn kinboshi (4)

I believe the answer is:

sumo

(Other definitions for sumo that I've seen before include "foreign form of fighting" , "Style of traditional Japanese wrestling" , "Japanese wrestling for huge men" , "slappers fighting?" , "Grappling" .)

I've seen this clue in The Washington Post.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.