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The sumo tradition is very ancient, and even today the sport includes many ritual elements from when sumo was used in the Shinto religion.
The criteria for winning are fairly straightforward:
Matches usually last only seconds, as one wrestler is quickly ousted from the circle or thrown to the clay. Each match is preceded by an elaborate ceremonial ritual. The sportsmen themselves are renowned for their great girth, as body mass is a factor in sumo.
Sumo matches take place in a ring called a dohyo. The dohyo is made of a mixture of clay and sand spread over the top. It is between 34 and 60 cm high. The circle in which the match takes place is 4.55 meters in diameter and bounded by rice-straw bales called tawara, which are buried in the clay. At the center are two white lines, the shikiri-sen, which the rikishi must position themselves behind at the start of the bout. Around the ring is finely brushed sand called the snake's eye, which can be used to determine if a wrestler has just touched his foot, or other part of his body, outside the ring. The yobidashi ensure it is clean of any previous marks immediately prior to each bout.
Sumo at the Great Amphitheatre in Veddo, as illustrated in a 1867 publication Sketches of Japanese Manners and Customs, available at Project Gutenberg
Professional sumo can trace its roots back to the Edo Period in Japan as a form of sporting entertainment. The original wrestlers were probably samurai, often ronin, who needed to find an alternative form of income.
Currently professional sumo is organised by the Japan Sumo Association. The members of the association, called oyakata, are all former wrestlers, and are the only people entitled to train new wrestlers. All practising wrestlers are members of a training stable run by one of the oyakata, who is the stablemaster for the wrestlers under him. Currently there are around 50 training stables for about 700 wrestlers.
Sumo wrestling is a strict hierarchy based on sporting merit. The wrestlers are ranked according to a system that dates back hundreds of years, to the Edo period. Wrestlers are promoted or demoted according to their previous performance and a Banzuke listing the full hierarchy is published two weeks prior to each sumo tournament.
There are six divisions in Sumo: MakuuchiThe Makuuchi or Makunouchi is the top division in professional Sumo wrestling in Japan. The division comprises of just over 40 wrestlers who are ranked according to their ability, as defined as their performance in previous tounaments. At the top of the d, JuryoJuryo is the second highest division in professional sumo wrestling in Japan. The name derives for ten ryo, which was in olden times the income a wrestler ranked in this division could expect to receive. Sumo wrestlers ranked in the divisions below Juryo, MakushitaMakushita is the third highest division in the professional sumo ranking system of six divisions for wrestlers. It ranks below Juryo. It should really be Shidan lit. fourth rank, but as Shi has the same sound as death in Japanese. As was only one division, SandanmeSandanme is the fourth highest division in the professional sumo ranking system of six divisions for wrestlers. Sumo wrestling., JonidanJonidan is the second lowest division in the professional sumo ranking system of six divisions for wrestlers. Sumo wrestling. and JonokuchiJonokuchi is the lowest division in the professional sumo ranking system of six divisions for wrestlers. All wrestlers, apart from those who have had successful amateur careers and are given special dispensation enter Makushita directly, start in this div. Wrestlers enter sumo in the lowest Jonokuchi division and, ability permitting, work their way up to the top Makuuchi division. Only wrestlers in the top two divisions are salaried, and they are called sekitoriA sekitori is a sumo wrestler or rikishi who is ranked in one of the top two professional divisions: makuuchi and juryo. Currently there are 70 rikishi in these divisions, who receive a salary and other perks, including having junior rikishi to effectivel (to have taken the barrier). Wrestlers in the lower divisions are regarded as being in training and receive a subsistence allowance, in return for which they must perform various chores in their training stable.
The topmost makuuchi division has a number of ranks within it. The majority of wrestlers are MaegashiraMaegashira is a rank in sumo wrestling. It is the lowest of five ranks in the top Makuuchi division. All the makuuchi wrestlers who are not ranked in sanyaku are ranked as maegashira, from one at the top downwards. In each rank there are two wrestlers, th and are numbered from one (at the top) down to about sixteen or seventeen. Each rank is further subdivided into East and West, with east being slightly more prestigious. Thus maegashira two east is ranked below maegashira one west and above maegashira two west. Above the Maegashira are the champion or titleholder ranks, called the Sanyaku. These are, in ascending order, Komusubi, Sekiwake, Ozeki and, at the pinnacle of the ranking system, Yokozuna.
Yokozuna, or grand champions, are wrestlers who generally are regularly in competition to win the top division tournament title near the end of a tournament. It is a rank held at the moment by only one man, Asashoryu. Other recent yokozuna include Akebono, Musashimaru and Takanohana, who retired in January 2003. In the previous decade, Yokozuna Chiyonofuji retired after winning an astonishing 31 tournaments. That's nearly as many as Akebono and Takanohana won together. Once a wrestler has been promoted to Yokozuna, he can never again be subject to demotion and is expected to retire on his own initiative if he cannot perform to Yokozuna standards.
All Sumo wrestlers take wrestling names called shikona (しこ名), which may or may not be related to their real names. Often wrestlers have little choice in their name, which is given to them by their trainer (or stablemaster), or by a supporter or family member who encouraged them into the sport. For more information, see Japanese name.
Professional Sumo is practiced exclusively in Japan, where it originated, but wrestlers of other nationalities participate. The first foreigner to win the top division championship was Takamiyama in the 1970s. He was followed by Konishiki who won the top division title on three occasions, and reached the rank of Ozeki. In 1993 Akebono became the first foreign born yokozuna. These three former wrestlers were all born in Hawaii. Former Yokozuna Musashimaru was the second foreigner to reach sumo's top rank and was born in Samoa. The current yokozuna Asashoryu is Mongolian and is presently (in 2004) the dominant force in the sport. Asashoryu heads a small group of Mongolian wrestlers who have achieved Sekitori status. Furthermore, recently wrestlers from Korea and several former Soviet and Soviet bloc countries have also found success in the upper levels of Sumo.
Approximately once a year the top ranked wrestlers visit a foreign country to give a display competition. Such display competitions are also regularly held in Japan. None of these displays are taken into account in determining a wrestler's future rank. Rank is determined only by performance in Grand Sumo Tournaments.