Due to the highway between Kyoto city to Tango region are completed after long time years by 19th July 2015, it will be about 15mins shorter trip than before by the bus.
For further details about the timetable, please check the link page of my blog. (updated on 28th July 2015)
http://seasidekyoto.blogspot.jp/2013/01/direct-bus-from-kyoto.html