Rikidozan, a pioneer in Japanese professional wrestling, held various prestigious titles throughout his career, including the Japanese International Heavyweight Championship. However, it's important to clarify that Rikidozan's career predates the formation of New Japan Pro-Wrestling (NJPW), which was established in 1972, several years after Rikidozan's passing in 1963. Therefore, there isn't a specific 'Rikidozan Japanese International Heavyweight Wrestling Champion Belt' associated with NJPW. Rikidozan's contributions to Japanese wrestling are monumental, and while he held numerous championships during his time, they were primarily associated with promotions of his era, such as the Japan Pro Wrestling Alliance (JWA).