Tomoharu was a smart scientist and he created Tojyo Pharmaceutical. He had a son Masaki Tojyo who had a daughter Kazuki. Hinoto predicted her that she would die twice for the Earth. Kazuki had a congenital disease and was condemned to die. Her father and grandfather tried to find a remedy to heal her. But they didn’t succeed and Kazuki died. Masaki promised her that he would bring her back.
Years past; Masaki and Tomoharu succeeded to clone partially Kazuki. In order to achieve the cloning and remembering his promise, Masaki sacrificed himself. The cloning was completed. Tomoharu didn’t see in the clone his grand-daughter. Indeed the clone had no sex; he is a combination between a man and a woman. Tomoharu considered that the clone had no soul. He decided to nickname him Nataku.
Tomoharu learnt from Hinoto that the sacred sword is the key of the “Jour de la Promesse”. So he decides to steal it in order to protect Nataku. When Kamui Shiro comes back to Tokyo, Tomoharu can detect the sacred sword at the Togakushi Shrine. He asks Nataku to steal it.
Nataku goes, steals it and brings it back to Tomoharu.
At the Tojyo Pharmaceutical inside the Sunshine 60, Nataku is stabilized in a serum whereas Tomoharu Tojyo explains Nataku is a genetic creation, an artificial human being created for the “jour de la promesse”. He interrogates his employees to know which information they find on the sacred sword. The only information they have is that the sacred sword is alive.
Another sacred sword does its appearance. Nataku feels the call of the swords. This calls become more and more important. One day, Nataku decides to help the sacred sword he stole. He breaks free and takes the sword to bring it to Fuma Mono at the great despair of Tomoharu.
Days past; Sunshine 60 is attacked by Nataku. For his grand-father, it confirms that Nataku has no soul. Fuma joins them and asks Nataku to achieve Tomoharu Tojyo. Nataku is ready to do it when Fuma stops him when he feels the presence of Kamui. On the roof, Kamui finds Fuma. Fuma tells him he must create a kekkai if he wants to protect people. He goes to attack him, but Fuma shows him Tomoharu Tojyo. Fuma attacks Kamui knowing he will protect the old man. Fuma is ready to finish him when Subaru Sumeragi arrives and creates a kekkai. To destroy the building, the kekkai must disappear. And to make a kekkai disappear, one of the ways is to kill the kekkai’s creator. So Nataku attacks Subaru, but Subaru is too strong. Understanding that, Fuma decides to finish the battle and asks Nataku to leave. Nataku accepts and goes away. Fuma destroys the kekkai. Kamui has just the time to save Tomoharu. He is hospitalized inside Tojyo Laboratories at Shinjuku. He receives the visit of Kamui and Daisuke Saiki. He thanks Kamui to have saved him. Kamui asks why Fuma was there. Tomoharu explains that Sunshine 60 is a kekkai. He explains also that Nataku is a clone of his grand-daughter and his son.
Shinjuku is attacked and completely destroyed by Beast. Tomoharu probably died with the destruction of Shinjuku.