Motokage? Isn't this Tokyo? The first two images on the pixiv account are on tokyo's site. Though it's a little strange that there aren't more pictures on there.

If it's not him, then it's someone who stole his pictures / perfectly replicates his art style.

Actually, I'm not sure if Great Akuta is a circle with more than one artist, it sure doesn't seem like it, but it makes me wonder why this pixiv account isn't linked to his mainsite, considering his style is so telling.

Seeing how http://www.pixiv.net/member_illust.php?mode=medium&illust_id=2836054 is also on his main site, this has got to be his pixiv profile too.

Why is this in the nice knowing you pool?

Because the pool's description precisely matches the point of this image.

Given that Suika's basically made a mess of Reimu's shrine and is passed out drunk on the floor...yeah.

Oh thats the shrine, ok then I get it now.