There are 3 categories:
1. Digital single-lens camera popular marketable goods ranking,
http://kakaku.com/camera/digital-slr-camera/ranking_0049/
where K-5 IIs is on 3'rd position, and K-3 on 14'th.
2. Digital SRL camera Hot Ranking
http://kakaku.com/camera/digital-slr-camera/ranking_0049/hot/
where K-3 is on 5, and K-5 IIs on 17
3. Digital single-lens camera Satisfaction Index Ranking
http://kakaku.com/camera/digital-slr-camera/ranking_0049/rating/
where K-3 is first, and K-30 fourth.
Exactly how they did this ratings, I don't know.
But the fact that K-3 is first on Satisfaction, before Nikon Df, Sony A7r, Nikon D800, and many FF cameras, is a very good result.