Why didn't Kami use the mafusa/demon containment wave on his evil twin?

[Warmmedown]

If Mutaito managed it (but died) and Roshi nearly managed it, plus Kami tried it on Majunior ("let that child junior alone"), why didn't he try it on the original KP* (sorry our KP)?

*KP=King Piccolo

edit: Mafuba, not Mafusa. Mafusa is the one they can use in the next Lion King.

 

[SSJ2]

Kami only learned the technique by watching Mutaito from the Lookout I'm pretty sure.

 

[GSM123]

Because Mutaito invented the technique.