Board Thread:Theories and Speculation/@comment-25319479-20180502154141/@comment-35480222-20180503140158

(UPDATED) I would like to highlight also that:

1.In the cover of Boruto 17 the cover says:"The phantom. Led astray". Moreover the word "Koji" means orphan in Japanese, and the character Kashin Koji is a sort of illusionist, phantom or mage from the late Muromachi period in Japanese myth.

2.He is extremely rationale, professional, has some assassin skill, he used genjustu on Katasuke.

3.Jigen himself said that he is talented and smart but also curious and whimsical, moreover he has a strong motivation to follow kara.

4.Someone has signed the toad scroll before Jiraya, and somone could have signed the scroll after Naruto. Moreover, Kashin's toad is quite big, old, his body has been rebuit, and he is neither Gamabunta, Gamahiro or Gamaken. Moreover the only frog used by Minato was Gamabunta.

5.Jiraya's ghost appeared in Shippuden 133, so he's definitely dead.

6.He uses a weird firestyle: without seals, dropping objects (toad or kunai) and the flame cannot be stopped.

These things lead me to say that Koji is a failed student of Jiraya, after Minato but just before Naruto (his toad tehcniques are too advanced, Jiraya learned rasengan only at that point in time). Maybe he could have forced a toad to sign a contract (after shippuden) and burned up his body, that's why his body has been rebuilt.

He could also be someone from the Sarutobi Clan (Sarutobi Clan likes firestyle, the fact that the Sarutobi clan symbol is appearing too frequently, in a boruto chapter is stated that Konohamaru's father was an anbu).