Manga kishi might work on after Naruto + harry potter
Might be old, sorry if it is but kishi was going to work on this manga below before Naruto and said he might work on it after. But he said explaining how magic worked in this series was difficult and took many pages and it wasn't good for a first 1 shot manga.
And if you read 7 lines from the bottom he said also if he made this manga people would think he copied harry potter, so he scrapped the idea.
So all those who compare orochimaru to voldemort and many other things to harry potter you are actually correct as he did look into it.
I've been reading and he has been inspired by many manga as we already know, he was obsessed with dragon ball the manga as a boy