Prognostication of Success in Sumo-Wrestler Appricants AKIYOSI SUDA About 320 Sumo wrestler appricants were divided into two groups a superior group (Makushita and Sandanme class) and an inferior group (Jonidan class and below, and quitter), according to their rank after ten series of matches. Comparison was made between both groups in regard to the distribution of their body measurements with the following results: No difference: Stature, Chest breadth, Chest depth, Bi-iliac diameter. Slight difference: Neck girth, Shoulder breadth, Chest girth, Maximum breadth of hips, Maximum girth of forearm, Maximum girth of thigh, Maximum girth of calf. Obvious difference: Umblical girth, Girth of upper arm (stretched), Girth of upper arm (bent), Epicondylial breadth of forearm, Epicondylial breadth of lower leg. The items of obvious difference are important as the factor of the fitness of the Sumo-wrestler (Makuuchi), it seems that chest depth is an essential factor. The loewest limit of the measurements of applicants morphologically fit to be good Sumo-wrestler are estimated and recorded in the text.