Ensign Ōmura, also referred to by the rank of sub-lieutenant, is a twenty-eight-year-old character in the film. He serves as the transport commander for the Tsushima Maru, the ill-fated evacuation ship at the center of the story. He is a military officer placed in charge of overseeing the logistics and safety of the vessel during its voyage from Okinawa. In his role as commander, Ensign Ōmura becomes involved in a critical dispute with the ship’s civilian captain regarding the navigation strategy to be used while passing through waters known to be dangerous due to the presence of enemy submarines. The captain argues for a zigzag course, a standard evasive maneuver to make the ship a more difficult target for torpedoes. Ensign Ōmura, however, overrules this recommendation and insists on maintaining a straight course to quickly clear the dangerous sector. This decision reflects a rigid adherence to orders or a specific tactical plan, highlighting the tension between military command and naval seamanship under the pressure of wartime conditions. The character does not have a developed narrative arc or personal relationships that are explored in the summary of the film. His personality and internal motivations are not elaborated upon beyond his professional function as a military officer and his specific command decision. Following the torpedo attack by an American submarine and the subsequent sinking of the ship, his fate is not disclosed, and his ultimate survival or death remains unknown. The narrative offers no specific information regarding any unique skills, abilities, or background history, defining him solely by his rank, his age, and his pivotal role in the tragic event as the officer who dictated the ship’s final course.