Nobody knows for sure- some say as early as the 8th century. Sumo as a somewhat organized sport with rankings started around the end of the 18th century.
After you wrestle with the sumo
Yes, that is about the age that apprentices join sumo stables. They have to meet certain height and weight requirements and they have to have some skills.
You have to have completed 9 years of school to become a member of a sumo stable. That is about age 15. You also have to meet the height and weight requirements.
In Japanese, there is no visible indication, it is determined by the context. He was a sumo wrestler. There were ten sumo in that stable.
Cow & Chicken
What English-speakers think of when they say "sumo" (i.e. heavyset men wrestling) is also called "sumo" in Japanese. Basically, sumo is sumo!
Sumo is a Japanese sport. There are Chinese sumo wrestlers.
Sumo
Yes Sumo are useful.
The champion sumo (Yokozuna) is inside the sumo match place.
In order to enter the sumo arena, you must accomplish 5 things:Go to the Fortress in East Edo and get the message from Jack and Annie.Go to the Lake and get the mortar, and talk to the old poet.Return from the lake and help the police identify the fish thief (one gives you his betting ticket for the sumo matchUse the rotten fish from the Fortress steps to catch the Kappa fish under the old bridge.Repair the old bridge with the mortar.Take the bonsai trimmer dropped by the girl and go to the Bonsai hut, and trim a bonsai for the sumo wrestler's assistant
just do the good deeds (there are three) then go to where the sumo's are fighting & you'll find him there after you fight the sumo (he's the old man in the hut(house))