Professional wrestling in Japan is commonly referred to as puroresu in Japanese, short for "professional wrestling" ("purofesshonaru resuringu"). The word puroresu was made popular by Hisaharu Tanabe among the English speaking fans in the early 1990s through Usenet and online services. Quite different from professional wrestling in the United States, Puroresu is treated as a combat sport as it mixes full contact martial arts strikes with complex and dangerous submission moves and other types of wrestling like amateur and submission wrestling. While it uses very few storylines or gimmicks, match outcomes are predetermined.