Night buses from Hiroshima to Kyoto

I saw info about night buses from Kyoto to Hiroshima. Wonder if they work the other way round.
Info however are all in Japanese and I don't understand.
Anyone knows how I can go about checking?
THanks.

yes they do. here's one discout bus company that serves english speaking travellers:

http://www.123bus.net/

Wonder if they work the other way round.

Yes, they operate in both direction.

Basic information on travel between Kyoto and Hiroshima:
http://www.japan-guide.com/e/e3404.html?aFROM=2158_2160

Of course they work both ways. Check JR Bus or 123bus or just Google "highway buses in Japan". I don't know where you are visiting, but there is also a cheap seasonal night train that you can use a JR pass or 18 kippu ticket on that runs from Hiroshima to Kyoto.