Actually the chidori is created from the lightning blade which is created from the rasengon and minato created it after seeing the biju bomb kakashi created lightning blade after trying to add an element to rasengon and sasuke has learned chidori from kakashi after he perfected it
Chidori wasn't created off of the Rasengan. The Chidori was created because Kakashi failed to add his Lightning Nature to the Rasengan. He says this during Naruto's Rasenshuriken training in Shippuden.
If you notice team sarutobi was the first version of naruto sauske and sakura and after team sarutobi it was team Minato with kakashi obito and rin and then team kakashi with naruto sauske and sakura.
"wItHoUt JiRaYia tHeRe wOuLd bE nO rAsEnGaN" man you ain't know shit about Naruto so stop acting like you do minato namikaze was the one who created rasengan WITHOUT jirayias help so no, no, no the rasengan would have still been created
Yes it was after Kakashi failed to apply lightning to the rasegan then he created the chidori. So if it wasn’t for that the chidori wouldn’t be a thing. So don’t come at me boyy if you don’t got all your facts straight.