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Every sign boruto will train with kashin koji
A thread
A thread
KK is a jiraiya clone who's sole purpose is to defeat isshiki and in flash forward scene isshiki is not defeated yet as kawaki had the karma
Kk states that the key to jigen aka isshiki's defeat lies with boruto and his karma
Kk also states mastering the karma and its secrets will lead to jigens aka isshiki's defeat and kk has observed jigen for quiet sometime and kk also knew about the resonance between boruto and kawaki's karma
Koji and amado are 2 of the only people who can help boruto to master his karma
Boruto hasn't learned the giant rasengan yet guess who else has can do the giant rasengan
In episode 120 of the anime boruto states he should hv learned fire style from sarada and kk also knows fire style
In ending 12 of boruto we see boruto using fire style if u take closer look the fire style boruto uses looks similar to fire style flame bombs
And boruto uses tiger sign to do the fire style which is the last hand sign u hv to weave to perform fire style flame bombs
In the naruto anime jiraiya uses water style and it is also likely kk also knows suiton ,moreover boruto also knows water style in the manga
And in the novel he uses water style water wall jutsu
And in the novel he uses water style water wall jutsu
In ending 12 we see boruto standing on top of a toad and kk also can summon toads
In the same ending we also see boruto having perfect sage mode and kk also has perfect sage mode
The flames kk uses against jigen to burn him to death would be really useful against kawaki in the flash forward fight
Then why miss the opportunity
Then why miss the opportunity
On top of that sasuke has amaterasu which is similar to the true flames of samadhi which koji can use and boruto wants to be someone like sasuke so teaching boruto something similar to that would be cool
Kashin koji lost his torso and one arm in the isshiki battle then why keep him alive if he has no role in the future
I am 100% sure kk will train boruto in the future
And who wouldn't love to see a jiraiya naruto relationship between and kashin koji and boruto
And who wouldn't love to see a jiraiya naruto relationship between and kashin koji and boruto
Also I think in the future kawaki will kill kashin koji same way pain killed jiraiya 
