Bus from Kowakidani Onsen to Moto-Hakone

Hi,
Does anyone know how often buses go from Kowakidani-Onsen bus stop (we are staying at the Mikawaya Ryokan) to Moto-Hakone. We are wanting to be there as early as possible in the morning so we would also like to know what the earliest bus time is? We can not read Japanese.
Thank you

Every 10-20 minutes:
http://www.hakone-tozanbus.co.jp/pdf/10138-001001.pdf

In addition to the above mentioned Hakone Tozan buses, there are also departures by buses of a different company, Izuhakone. But the latter are not covered by the Hakone Free Pass.

Thanks Uji. This is very helpful. Can you confirm that the bus stop for Mikawaya has changed name from Kowakidani-Onsen to Horaien?
Also do you have the return timetable from Moto-hakone to Kowakidani?
Thank you again

Kowakidani-Onsen to Horaien?

The bus stop is referred differently on different websites. I am not sure which one is the former and the present one. Or when it changed.

Also do you have the return timetable from Moto-hakone to Kowakidani?

From Moto-Hakone-ko, the main bus stop in Moto-Hakone:
http://www.hakone-tozanbus.co.jp/pdf/10152-002001.pdf

Thanks Uji. You have been very helpful.