Nobuhiko Ōshima (born November 15, 1977), better known by his ring name CIMA (pronounced Shima), is a Japanese professional wrestler currently working as a freelancer. He most recently wrestled for Chinese promotion Oriental Wrestling Entertainment (OWE), where he also served as the company's president, and was signed to American promotion All Elite Wrestling (AEW). He is best known for his work with Japanese promotion Dragon Gate, whom he worked for from the company's formation in 2004 up until 2018. He held every available championship in the promotion, including the Open the Triangle Gate Championship a record 12 times.