250 kg is the weight.
No. Sumo is traditionally only for men.
Sumo is a Japanese sport. There are Chinese sumo wrestlers.
Women are allowed to sumo wrestle but they can only compete at the amateur level. Women are not allowed to touch the sumo wrestling ring or enter professional sumo competition. This is due to the belief that women touching the wrestling ring will make the dohyo not pure.
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)
No, they actually fight by skill level. Weight is not factored into the competition.
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Sumo wrestlers can be of any nationality. It is starting to spread to other countries from Japan. To become a professional is difficult and only occurs in Japan.
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.
YES Sumo wrestlers in ancient japan. Japanese sumo's opened there mouths and swallowed the flies that were on there faces
No.