Jan-Ken otherwise known as rock, scissors, n' paper is a tenique used by goku. He first shouts Jan-Ken and charges at the opponent, he then shouts either rock, paper, or scissors. If the user shouts rock then he will give his opponent a strong punch, for paper an open palm strike, and for scissors a poke in the eyes.
- It is stated by goku that his Grandpa Gohan invented the tecnique
- In the Tenkaichi series video games Granpa Gohan's ultimate features the Jan-Ken tecnique as his ultimate, however his ultimate is called "Turtle School Tranquility" leading us to believe that Master Roshi invented the tecnique.
- Or it is possible that Master Mutaito invented the tenique seeing as how Mutaito taught martial arts to Master Roshi