Kenzan (ケンザン) is the leader of the Swordbot Samurai Team. Despite his relative youth, he takes himself and his role very seriously. That sense of responsibility, combined with his bravery and great martial skill, make him a fearsome warrior, but he is sometimes prone to recklessness. He values the training in swordsmanship he received from Go Prime, and respects such skills in others.He can combine with Jinbu and Ganoh in various configurations. With Kenzan as the top, GoKenzan (ゴウケンザン Gōkenzan) is formed. After the arrival of Optimus Exprime on Earth, he also gained the ability to combine with Optimus and the Shinobi Team leader Gekisoumaru. With Kenzan forming the head, shoulders, and arms, the combined form is called DaiKenzan (ダイケンザン Daikenzan). His Mini-Con partner is Zan.
The Swordbot Samurai Team were woken from their slumber by Isami Tatewaki when Budora and Gaidora tried to obtain the Legendisc he was protecting. Confronted by the Jaki which the two Predacons summoned, the team switched through their various combinations, culminating in them using their GoKenzan form to finish off Goradora. On striking the two Predacons, the Autobots and Isami found themselves briefly transported back in time where they saw two armies carrying Legendiscs. On their return to present day, Kenzan invited Isami to help them fight the Decepticons, and they discovered that Isami's friend Tobio Fūma had also encountered the Swordbot Shinobi Team.
The Swordbots built an underground base beneath Isami's dojo which Kenzan showed off to the boy, before Optimus Prime briefed the team and their friend on what was known about the Legendiscs. Sometime later, history started changing causing buildings to disappear, and Isami's Legendisc transported the team back in time again. In the past they encountered Musashi Miyamoto whose Legendisc had been stolen by the Predacons, and the Swordbots helped him get it back by fighting the Jaki in their GoJinbu form. Isami and the Swordbots were returned to present day, though without the disc.
On another occasion Isami and the Autobot team went back in time and encountered Ryōma Sakamoto. On that occasion, they battled the Jaki in their GoGanoh form, however they again returned to the future emptyhanded. Isami was discouraged, but Kenzan gave him a pep talk to try and bolster his spirits. They again headed to the past, this time helping Benkei Musashibō fight off the Predacons in their GoKenzan form, and again returned to present day without the Legendisc.
On their next jaunt into the past, Isami managed to obtain the Legendisc, only to be confronted by Gaidora, Judora and the awakened Dragotron on their return to present day. Though they were no match for Dragotron, even in their GoKenzan form, the team was soon joined by Optimus Exprime. The Predacons abducted Isami, and the Samurai Team merged into GoJinbu to give chase. They arrived at Mount Fuji to find the Shinobi Team was also there as Tobio had also been kidnapped. Imbued with the power of all five Legendiscs, Dragotron proved impossible to beat, however Tobio and Isami managed to demerge from him. The two boys had duplicated the power of the Legendiscs, and used it to allow Optimus and the two teams to merge into DaiKenzan. This provided them with enough power to defeat Dragotron and seal the Predacons away once more.
- The zan in the name "Kenzan" is likely derived from 斬, meaning "beheading" or "kill". Ken probably comes from 剣, meaning "sword".