Keiichi Yamada, better known as Jyushin Liger and later Jyushin Thunder Liger, is a Japanese professional wrestler and former mixed martial artist who debuted in 1984 for New Japan Pro-Wrestling. Over a career spanning more than three decades, he competed against many of the world’s top wrestlers in major events worldwide and is widely regarded as one of the greatest and most revolutionary junior heavyweights of all time.