Dr. Sakezō Sado is the ship's surgeon aboard the space battleship Yamato. Originally trained as a veterinarian, he shifted to human medicine after Earth's devastation by alien attacks. His expertise proves vital during deep-space missions, where he manages crew injuries and illnesses with serious dedication. During critical health crises, such as those involving Captain Okita, he advocates decisively for surgical interventions despite resistance.

Beyond emergencies, he provides comic relief through his fondness for sake, often appearing in humorous scenarios like securing his sake bottle in a safety harness during warp travel instead of himself. He treats the drink as a companion during high-stress operations. Despite this levity, he maintains authority when reprimanding crew about health or conduct.

Dr. Sado represents a recurring archetype in Leiji Matsumoto's works, appearing similarly in series like *Wadachi* and *Danguard Ace*, establishing him as a stock character in the creator's universe.

In *Star Blazers: Space Battleship Yamato 2205*, he continues as part of the Yamato's crew under Captain Susumu Kodai, with the ship serving as flagship for a fleet including the support vessel *Asuka* and carrier *Hyuga*. He remains listed among the primary cast.