Depends what you're after...
Kotoamatsukami can make someone do whatever you want them to for the rest of their lives without them knowing...
Dust Release can kill you instantly... Same with Chibaku Tensei...
There's the 'Creation of all things' technique that Rikudo himself used to create the Bijuu...
Then we have TBB with all of it's destructive power...
Frog Song can basically take out an entire army within a minute...
Izanagi allows you to completely alter reality itself...
The Rinnegan grants the user an ability to remove a being's soul from their body...
There's a lot of techniques that you could call the 'strongest'
But why did you say Jitsu? Was it 4 typos in a row or did you think i was called Jitsu?
