Nobuhiko Oshima, better known by his ring name CIMA (pronounced Shima), is a Japanese professional wrestler currently working for Oriental Wrestling Entertainment (OWE), where he also serves as the company's president and currently signed to All Elite Wrestling (AEW). Oshima is best known for his work with Dragon Gate, whom he worked for from the promotion's formation in 2004 up until 2018. In Dragon Gate, he held every available championship in the promotion, including the Open the Triangle Gate Championship a record 12 times.