Keiichi Yamada (山田恵一, Yamada Keiichi, born November 30, 1964), better known as Jushin Liger (獣神ライガー, Jūshin Raigā) and later Jushin Thunder Liger (獣神サンダー・ライガー, Jūshin Sandā Raigā) is a Japanese retired professional wrestler and mixed martial artist who is best known for his work in New Japan Pro-Wrestling (NJPW), where he is the longest-tenured member of the roster, having remained with 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, including America's WWE, where he was also inducted into the WWE Hall of Fame Class of 2020.