No, they actually fight by skill level. Weight is not factored into the competition.
No, there are no weight classes in sumo. So a wrestler can be matched up with someone who is much heavier. That is why weight gain is so important in sumo training.
until one of them get out of the circle
250 kg is the weight.
Sumo is a Japanese sport. There are Chinese sumo wrestlers.
This depends on the sumo wrestler and wrestler in question. However, it can generally be agreed that sumo wrestlers are stronger. (However, many recreational/amateur sumo wrestlers are not strong)
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Sumo wrestlers need body composition because it adds to their overall mass. They need the weight so if makes it harder for their opponent to move and throw them.
There are Chinese Sumo wrestlers. Those that make the most money are wrestling in Japan.
It is not done on a mat. The ring is called the dohyo and is clay reinforce with straw.
YES Sumo wrestlers in ancient japan. Japanese sumo's opened there mouths and swallowed the flies that were on there faces
No.
No. Sumo wrestling and other wrestling have nearly nothing in common-most wrestling involves fighting on the mat-if you touch the floor in sumo you lose..