The various tourist sites that list options for getting around Kyoto all list buses 101 and 102 as good options for getting to popular temples from Kyoto Station, but none mention them running in the opposite direction to get back to the station. Indeed some specifically say that they leave Kyoto Station.
It's not clear to me whether this is an oversight or if they truly do run one way only, since they finish at a different train station. As a counterpoint, Google Maps' public transport map suggests both ways.
Anyone got first hand experience?