Katasuke Tōno

is a jōnin from Konohagakure who appears in Boruto: Naruto the Movie. He works for Konoha's Science Ninja Weapons Team.

Appearance
Katasuke has a short crop of brown hair and brown eyes. He also wears a pair of glasses.

Boruto: Naruto The Movie
As a scientist, he invents a forearm device that stores and releases ninjutsu as the user's will. He wanted to introduce it at the Chūnin Exams but Naruto Uzumaki considered it to be a form of cheating and forbade it. However, unbeknowst to Naruto, Katasuke introduces the device to Boruto Uzumaki, who uses it during the Chūnin Exams. Once Naruto discovers this and disqualifies Boruto for cheating, Katasuke tries to announce to the audience that there was no point in using traditional ninjutsu techniques due to how far advanced their technology is before Momoshiki and Kinshiki attacked the arena. Katasuke joins the rescue mission to rescue Naruto from the two enemies and attempted to use the device on Momoshiki, who absorbed all his attacks and this increased his strength.