Movie
Description
Jintaro Kuroiwa is the chief of the Shimo-Kasukabe Police Station in Saitama Prefecture. On the surface, he presents himself as a dedicated, if somewhat eccentric, public servant. He is a pronounced narcissist, having filled his personal office with mirrors so he can admire his own reflection. This self-absorbed exterior, however, hides a much darker and more desperate interior.

Kuroiwa's role places him at the center of the film's central conflict. Initially approached by Misae Nohara about her husband Hiroshi being mysteriously transformed into a robot, Kuroiwa dismissively assigns a clumsy female officer to the case before returning to his own concerns. He later refuses to intervene in a series of anti-feminist demonstrations led by a burly older man named Doukatsu Tekkenji, citing the citizens' right to protest.

This nonchalant attitude is a facade. In a crucial twist, it is revealed that Jintaro Kuroiwa is the true mastermind behind the entire incident, with Tekkenji being a robot he controls from afar. His motivation stems from a deep personal wound. Despite his successful career and youthful appearance, which make him look like he is in his twenties, he is an older man with a teenage daughter. His family life is profoundly unhappy; his wife and daughter treat him not as a husband and father but as a mere source of income, disregarding his feelings and even forgetting his birthday. This emotional neglect and sense of being used as a tool drove him to conspire with a disgraced scientist, Dr. Gamma, to seek revenge on a society that he believes has devalued fathers. His plot involved transforming Hiroshi Nohara into a robot and brainwashing him to lead a protest movement, making Kuroiwa a twisted reflection of the very robotic fatherhood he sought to rebel against.

His key relationships are defined by this bitterness. He has a contentious rapport with his subordinates, particularly officer Teruyo Dandanbara, whom he mocks with demeaning nicknames. His primary adversarial relationship is with the Nohara family, especially the five-year-old Shinnosuke. It is Shinnosuke who sees through Kuroiwa's pain, bluntly telling him that his problems are a family matter to be solved at home, not by terrorizing strangers. This harsh truth from a child shatters Kuroiwa's composure, leading him to abandon his cunning plan and lash out in a direct, enraged attack.

In terms of development, Kuroiwa moves from a composed, calculating mastermind to a desperate and emotionally exposed villain. His scheme ultimately fails, and he is arrested red-handed by the very officer he used to belittle. At the moment of his defeat, he finally addresses Dandanbara by her correct name, a small gesture that suggests he is accepting his loss with a shred of honor. In the film's epilogue, he is shown in prison, his head shaved, finding solace in singing enka music with Dr. Gamma as a form of recreation. Notably, a visit from his wife and daughter, who appear to regret their past behavior, hints at a potential for reconciliation and a more positive path forward for him.

As for notable abilities, Kuroiwa demonstrates a high level of intelligence and strategic planning, having orchestrated a complex technology-driven conspiracy. In the final confrontation, he pilots a giant robot to battle the Nohara family personally, proving himself a capable combatant when cornered.