Gengo (in Japanese: ゲンゴ, Gengo) is an antagonist from the anime and novel series Naruto Shippuden. He acts as the main antagonist in Shikamaru Hiden: A Cloud Drifting in Silent Darkness (Arc).
He was voiced by Atsushi Ono.
Gengo sees the world as it needs to be recreated. Gengo believes that the shinobi should be the ruling class of society. With his ambitions, he planned to bringing the world together and have shinobi control.
Gengo, along with other Kirigakure ninjas, teams up with Zabuza in revolting against the Fourth Mizukage and his atrocious ways of ruling over the village. Zabuza and the group, including Gengo, were left with no choice but to flee the village permanently. After the incident, Zabuza and most of his other followers began hiring mercenary ninjas. When Zabuza agrees to work under corrupt people, however, Gengo and many others defected.
After leaving the group, Gengo arrived to the Land of Silence and seized the nation. He made a genjutsu (Demonic Illusion: Cajolery of Glamour) to get closer to his ambition of manipulate others into working for him.
As Gengo's Enlightened Ones were growing, he starts gaining attention to himself from the world, specifically the Shinobi Union as they began to realize many of their people start going missing while investigating his nation for taking their potential jobs. His recent brainwashed recruits, which includes Sai, prompted Konoha to demand his capture or death.
During one of Gengo's many speeches meant to keep people in Curtain Village, Gengo held Konoha shinobi captive Rō, Soku, and Shikamaru Nara, who was then detained. Gengo was thrilled and tries to make him into becoming his right-hand man. Temari, Ino, and Choji stormed Gengo's throne room and interrupted Gengo's genjutsu. Shikamaru then finally comprehends Gengo's abilities and Temari began using her fan to create a vacuum to eliminate Gengo's chakra infused voice.
Gengo fled his Enlightened Ones as Shikamaru pursues. Gengo tried to use his sword to defeat Shikamaru but Gengo was then detained. Hinoko then used her Chakra Needle to take away Gengo's ability to speak. He's then taken to the Shinobi Union's headquarters in the Land of Iron.