http://www.citylab.com/commute/2014/11/kyoto-can-teach-the-dc-metro-a-lesson-about-express-tracks/382286/
I don't know why Kyoto is used as an example, as this practice is widespread in Japan, maybe it's because Kyoto is trendy nowadays, especially among the waspy liberals that likely read urbanist and transport blogs.
*The caption for the Eizan picture is a little misleading though, implying some kind of seamless transfer to Keihan, like a cross platform deal, when in fact the Eizan terminal is at ground level, which requires you to exit the ticket gate, walk and go down an escalator to the Keihan terminus underground.