Eiji Ezaki was a Japanese professional wrestler, stage actor, musician and professional wrestling promoter, better known under the ring name Hayabusa . He was best known for his time with Frontier Martial-Arts Wrestling (FMW), where he primarily wrestled throughout his career and was the franchise player of the company between 1995 and 2001.

Professional wrestling has accrued a considerable amount of jargon throughout its existence. Much of it stems from the industry's origins in the days of carnivals and circuses. In the past, professional wrestlers used such terms in the presence of fans so as not to reveal the worked nature of the business. Into the 21st century, widespread discussion on the Internet has popularized these terms. Many of the terms refer to the financial aspects of professional wrestling in addition to in-ring terms.