Shintaro Masuda (枡田 慎太郎, born July 8, 1987, in Kyoto, Kyoto) is a Japanese professional baseball infielder for the Tohoku Rakuten Golden Eagles in Japan's Nippon Professional Baseball.

• Career statistics from Baseball Reference (Minors)
• "Register : Masuda, Shintaro (Tohoku Rakuten Golden Eagles)". bis.npb.or.jp. Retrieved 2014-01-31.