The Hypnosis Technique (催眠の術, Saimin no Jutsu) is used to hypnotize and control the mind of the target.
The technique is used by Baba's brother Master Roshi (disguised as Jackie Chun) when he fought Man-Wolf in the 22nd World Martial Arts Tournament. Man-Wolf could not turn back to a human because Roshi destroyed the moon with a MAX Power Kamehameha to return Great Ape Goku to normal during the 21st World Martial Arts Tournament. Master Roshi uses the Hypnosis Technique on Man-Wolf to convince him that Krillin's head is the moon. The Hypnosis Technique works and Man-Wolf turns back to a human.
Appearances in games
In the video game Dragon Ball: Revenge of King Piccolo, General Blue uses hypnosis to brainwash Octopapa and makes him take part at his battle against Goku. In Dragon Ball Z: Harukanaru Densetsu, King Kai uses this technique to oblige Vegeta to tell him jokes.