Kozuka is the Governor of Tokyo in the 2016 film Shin Godzilla. As the capital's highest local official, he participates in high-level government crisis meetings convened to manage the escalating emergency caused by the creature's attacks. His role involves coordinating with national ministries, relaying the needs of the metropolitan government, and implementing evacuation and civil protection measures. The character appears alongside a large ensemble of bureaucrats and political figures, highlighting the tension between urgent action and the rigid protocols of Japanese administrative hierarchy. The film does not explore his personal background, inner motivations, or development in detail, and he remains a secondary figure whose presence reinforces the institutional dynamics at play. He has no special abilities beyond his official authority as governor.