Sea Without Exit (2006)

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Koji Namiki, a talented young pitcher, who had won the National High School Baseball Championships enters university, but soon afterwards injures his elbow. He and his teammates work hard to get back on the field placing all his hopes on a new slow-ball, "the magic pitch." However, the outbreak of WWII wipes out the baseball ambitions from everyone. They join the military and in the navy undergo the severe training that prepares them for death. Death awaits them in a "kaiten" the special attack submarine or "human torpedo" within the gloomy ocean depths, but Koji never gives up his dream of the "magic pitch" .