Shonen is filled with misogynistic crap and a lot of it is brushed off as "for the teens". Is this really what Japan wants their male teens to be reading?
That's on the publisher and the editorial of the magazine to decide what is published and the public itself buying the material. It's not like parents out there in Japan didn't protest about some series before in shounen magazines, sometimes that happens but you can count in one hand the times that changed something which was basically only Harenchi Gakuen which was cancelled in the 70s as one of the first ecchi manga.
And the readership of any magazine and it's demography depends. Here examples for the magazines of Shueisha:
With Shonen Jump for example, here's a more detailed readership percentage:
9 years old and below (3,2%), 10-12 (9,6%), 13-15 (16,4%), 16-18 (17,6%), 19-24 (25,8%), 25 and above (27,4%)
You can see more details for the other magazines here, which is also a source for the images above.
http://www.mangamag.fr/actualite/ac...pre-publication-de-manga-de-shueisha-en-2018/
In the case of Shonen magazine which is a directly competitor being also a weekly shonen anthology, their readership of teenagers and children are quite smaller in comparison to WSJ and most of their public is above 20.
Yes, but it's more prominent in Shonen, especially when so many series are just male wish fulfillment crap. We are seeing more mangaka write more balanced stories but the genre is still filled with shit.
Shonen isn't a genre, it's a demography. Even if you're using it for Battle Shonen, it's called Battle Manga in japan for a reason as it can fill every demography.
I guess that will change the when more magazines want prominent Western audiences. It seemed to help Jump cut down on the stuff anyway.
That's not going to happen. Manga is a domestic product much like the magazines and publishers are domestic as well. There's a reason for why licensing exists since the publishers don't have subsidiaries in other countries for that, which in comics market that's quite common even in the US considering that Image, Marvel, DC and many others have to license their series to publishers of other countries as well.
And what is your example on jump? You must be talking about Viz Shonen Jump because the actual magazine shonen jump never did something like that, which in that case makes your example quite weird as the english shonen jump isn't the original and is irrelevant for the case.