Were Tobirama and Minato the last shinobi to perform Flying Raijin? Is there anyone else to know that jutsu?
And why was it not passed onto his students(Kakashi) /sensei(Jiraya)?
I know Jiraya mastered Rasengan after looking at Minato's Rasengan. Kakashi passed Chidori to Sasuke.Jiraya passed Rasengan to Naruto. So why did Tobirama or Minato not pass Flying Raijin onto their disciples?