Why? How do they contradict an ATL strain of Japanese Catholicism?
You have the emperor converting to Catholicism.
Which requires a POD somewhere in the 1500s at least.
That's
400 years before the first manga is even
made.
Even if we're generous and accept the earliest type of proto-manga, It's still 200 years after your potential POD.
Basically to answer your question, you've thrown out everything that would lead up to the creation of Manga as
we know it, and asking us to basically write 500 years of history so that you can wonder if
Dragonball is still made.
This is like asking if Superman is still going to marry Lois Lane in a world where Henry the VIII didn't convert.