Live action TV
Description
Kenjiro Ota serves as an officer aboard the space battleship Yamato, primarily operating within the navigation division. His role is most commonly associated with that of a radar operator, where he is frequently heard identifying incoming missile attacks during combat situations. In the original series, his duties center on this radar operation, but in the reboot continuity of Space Battleship Yamato 2199 and its sequels, he holds the more specific position of chief weather officer with the rank of ensign, responsible for observing and reporting vital space weather conditions and trajectory information to guide the ship's navigation.

Physically, Ota is recognized for his portly build and freckled complexion, a design that contributes to his approachable and everyman persona. His background places him as a native of Osaka, and this origin complements his bright, optimistic, and unreserved personality. He functions as a significant mood-maker among the crew, boosting morale with his lively demeanor, but this tendency also manifests as a notable inclination toward lighthearted behavior and practical jokes. Specific examples of his mischievous nature include tricking nurse Makoto Harada into wearing a skimpy maid costume under false pretenses during a celebration, an act that led to her public embarrassment and subsequent retaliation by forcing him to consume an excessive amount of alcohol. On another occasion, he took advantage of Yasuo Nanbu's unconscious, drunken state to play a prank on him. In the original series, his joking character is further highlighted when he feigns enjoyment of Yuki Mori's coffee, which is revealed to be a jest rather than genuine praise. These actions cement his reputation as the crew's jester, yet his active participation in farewell celebrations and social rituals reflects his full integration into the Yamato's community and acceptance by his fellow crew members despite his troublesome pranks.

Ota's role in the story is largely supportive, contributing to the operational functionality of the Yamato while also providing moments of levity. His key relationships are defined by his interactions with the crew, often as the target or instigator of lighthearted conflicts, particularly with Makoto Harada and Yasuo Nanbu. The character also demonstrates notable development across different iterations of the series. While initially portrayed as a portly radar operator and a source of comedic relief, his later portrayal shows career advancement and growing professionalism. In the events following the Gatlantis conflict as depicted in the 2199/2202 reboot timeline, Ota achieves the rank of First Lieutenant and serves as the Navigation Division Captain aboard the combat carrier Hyuga, a position that involves leading the navigation division and operating the ship's controls. This progression signifies a transition away from being merely a gluttonous mood maker toward a more focused and responsible professional capacity. His abilities are primarily technical in nature, centered on the proficient operation of radar and navigation equipment, as well as the specific expertise to analyze and report on space weather phenomena, which proves essential for the Yamato's long-term voyages.