Live action TV
Description
Koshikakeman is a spy robot featured in the 1973 tokusatsu series Robot Keiji. He operates as an agent of the criminal organization BAD, which rents out robots for illegal activities. His primary function is infiltration and intelligence gathering, and his most distinctive method is disguising himself as an unusual-looking chair. This disguise allows him to remain unnoticed while observing targets and collecting information. Koshikakeman is also capable of printing out stored documents and memorized images, fulfilling his role as an information-gathering unit.

His design is based on an electric chair, and he uses this motif as a weapon. When someone sits on him while in chair form, or when he grapples an opponent in combat, he can deliver a powerful high-voltage electric shock. He can also transform his body directly into an electric chair during a fight to restrain and electrocute victims. Koshikakeman is equipped with four wheels for swift movement, and he can extend spikes from his body to perform rapid stabbing attacks, as well as to kidnap targets or escape. He is a methodical and ruthless operative, carrying out BAD's orders without hesitation.

In the story, Koshikakeman appears as the villain of a specific episode. He is deployed by BAD to eliminate a target or gather intelligence, and his unusual disguise makes him difficult to detect. His confrontation with the protagonist K begins when K investigates the case. During their battle, Koshikakeman manages to trap K in his electric chair form and subjects him to high-voltage torture, even attempting to bury him by spinning rapidly into the ground. However, K escapes by matching his own spinning motion, reversing the trap, and forcing Koshikakeman into a pit he dug himself. With Koshikakeman immobilized, K destroys him with his robot destruction cannon. Koshikakeman has no further character development, as he is a single-episode antagonist. His role is to demonstrate the variety of threats posed by BAD's robots and to challenge K's abilities. No significant relationships are established beyond his affiliation with BAD and his opposition to K.