[warainagara]

Spoiler for in response to Toua:

Originally Posted by Toua

There are so many titles available on the japanese paper publishing market that there is a need to target titles to readers systematically, unless their consumer base, as big as it is, would just be confused. They wouldn't know what to buy.

Thanks for pointing out an important fact about the distinction.
But I don't think I downplayed its role.
It started at a time when men's and women's tastes were extremely different and such a difference are getting less significant these days.
Just think about why Marimitte is popular among guys.
And that's why the publishers and anime producers care about the other sex that is not officially thought of as the target audience of a title.

And I hope you're not missing a valuable point here: manga serialized in seinen magazines will always be called seinen manga, and that's because the author started out with elements that would be more comfortable to young men.
....

Don't get me wrong; I love that both men and women can enjoy this show, because it has both moe and bishounen. I believe these kinds of shows are winners, still I'm not going to get out of my way and proclaim it as a shoujo show just because I'm a rabid BL fangirl who sees things that aren't there. (And I'm not.)

Well, I'm not so big a fan of BL and I don't find Kyoshiro interesting.
And I partially agree with you in that mangas in seinen or shounen mags do have elements for them.
What I'm saying is some of them are aimed even at girls or women and the titles I mentioned including Kyoshiro are the examples.
Remember, one who decides the target of a title is its author and the marketing team in its publisher, not readers.
The latter can like or dislike their policy but they don't have right to demanding what a title should be like.
For it is not a fanservice but a business and they are just following the trend.

Kaishaku obviously serialized Kannazuki no Miko and Kyoushirou to Towa no Sora in male oriented magazines because... well, it's pretty obvious to me at least. First and foremost reason: lesbians are still in a minority, and those kind of relationships are mostly fantasized by men. Kannazuki no Miko's prevailing theme was a relationship between two women that was idealized for a man's vision of them. There were bishounen in KnM but that doesn't mean it had BL/shoujo themes/elements. It just had bishounen.

I understand that you are probably a Westerner who by common sense thinks that girls who like yuri are lesbians.
Most East Asian girls who like yuri are not lesbians and that explains why it is said that females compose 50% of yuri fans there.
This is a facet of East Asian culture that has its own history but I don't want to explicate it here.
So you might need to find another reason for serializing KnM and Kyoshiro in male oriented mags.
They do so because they know males spend more money on manga in general and and came to find a huge male need for yuri by the big hit of Marimitte.
There were lesbian animes for adults even before Marimitte, which were aimed at males in every sense, needless to say.
The yuri contents after Marimitte are neutral in their character.
And that allows the publishers to advertise them even in female oriented mags, which they do actually.
A yuri serialized in male oriented mags but advertised in both male and female oriented mags, that's the standard type these days.