Keiichi Yamada , better known as Jushin Liger and later Jushin Thunder Liger , is a Japanese retired professional wrestler and mixed martial artist, currently signed to New Japan Pro-Wrestling (NJPW). He is the longest-tenured member of the NJPW roster, having wrestled for the company since his debut in 1984 until his retirement in January 2020. Throughout his career, which spanned three-and-a-half decades, he wrestled over 4,000 matches and performed in major events for various promotions across the globe.

Jushin Liger is an anime superhero TV series created by Go Nagai. Produced by Sunrise Inc. with cooperation of Dynamic Planning, the series was originally broadcast on Nagoya Broadcasting Network (NBN)/TV Asahi from March 11, 1989 to January 27, 1990 with a total of 43 episodes.