The 1st photo shows the intermission between matches.
The 2nd photo shows Yokozuna(a grand champion),Asashoryu from Mongolia.
The 3rd photo shows today’s champion Oozeki(second highest rank in sumo ),Chiyotaikai.
There are many workers without sumo wrestlers.
Stable masters ,traditional announcers on the sumo ring,service men for each box sheet(we call it “Ochaya”),cleaners on the sumo ring,sumo wrestling referees and so on.