Yutaka Hayashi

A shikakenin was an under-the-cover trade that undertook killing in Edo. Hanemon of Otowa, an agency that introduced laborers and maids, was also one of these. Katsugoro Iseya was a timber dealer who had come in as a client. His target was the constructions magistrate Hanno, and the Tatsumiya who sipped on the benefits. Hanemon who had a stong code towards killing, where he would only kill those who do no good to be in the world, accepts this request. Baian Fujieda, a needle doctor would carry out the killing. However, the professional killer Baian fails to bring down Tatsumiya. Hanemon then looks to another shikakenin, the ronin Sanai Nishimura for the role. Although Sanai's ability with the sword is good, he lives poorly in a tenement, and accepts this commission on the condition that it is kept a secret from his wife and child. Here, they close in on Hanno and Tatsumiya again...

Kenichi and his detective uncle, Shunsaku Ban, leave Japan to visit Metropolis, in search of the criminal, Dr. Laughton. However, when they finally find Dr. Laughton, Kenichi and Shunsaku find themselves seperated and plunged into the middle of a larger conspiracy. While Shunsaku searches for his nephew and explanations, Kenichi tries to protect Tima (a mysterious young girl), from Duke Red and his adopted son Rock, both of whom have very different reasons for wanting to find her.

Inventor Goro Ibuki creates a humanoid robot named Jet Jaguar. It is soon seized by an undersea race of people called the Seatopians. Using Jet Jaguar as a guide, the Seatopians send Megalon as vengeance for the nuclear tests that have devastated their society.