Eisa underwent drastic changes in post-World War II Okinawa. In 1956, then under U.S. occupation, the first Zentō Eisa Contest was held in Koza (part of the modern-day Okinawa City). It was originally an effort to recover from the great damage to the base-dependent commercial city caused by the "Off Limits" ordinance by the U.S. military. As a contest, participating groups were judged by screening criteria such as costumes, formation, technique, the number of performers, and innovativeness. Folklorist Kumada Susumu noted values imposed by the criteria. They clearly emphasized group dynamics, although earlier groups were not necessarily large. Contrary to today's perception of Eisa as Okinawa's tradition, they did encourage the creative nature of Eisa. In fact it was not uncommon to wear Western clothing during the performance.