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Japanese filmmaker Satoshi Isaka directs the baseball comedy Mr. Rookie, adapted from the novel by Dankan. By day, family man Koji Ohara (real-life baseball player Kazushige Nagashima) manages a construction company. By night, he's the masked pitcher of the Hanshin Tigers known as "Mr. Rookie." When he injures his shoulder while playing with his son Shunsuke (Yoneda Ryo), Ohara is given a superpowerful massage by Yang (Jun Kunimura) that vastly improves his game. While the Tigers manager Segawa (Isao Hashizume) demands more out of him, he finds his skills are putting strain on his marriage to Yuko (Mayu Tsuruta) as well. Meanwhile, an investigative reporter is sent to unmask the legendary "Mr. Rookie," and his celebrity is blown up to enclude endorsements for "Mr. Rookie Beer."