Niseko to Lake Toya transport?

Hi all

I am planning a trip to Hokaiddo in the coming Golden week. I was looking at my travel iternary and have 1 problem. I do not know how to go from Niseko to Lake toya. Can anybody please tell me the transport options preferably via bus ?

Thanks in advance :)

As I googled, there seems to be bus route with one transfer.

https://goo.gl/ZK9Ess

Niseko Hondori 11:26 11:54 Rusutsu 12:10 12:26 Toyako onsen byoin

However, Donan bus's PDF shows somewhat different timetables.

https://goo.gl/hmm6hw

Niseko Hondori 12:36 13:04 Rusutsu 13:18 13:57 Toyako onsen

The upper site is a third party website, but the Donan bus site seems to be somewhat older.

In any case I think there should be a bus route, but there are not so many (probably once a day) and some bus seems to require advance booking by telephone (there should be very few travelers and if there are no, they might cancel the operation of the day). According to the Donan bus site there are some buses operating on Sunday/Holiday only from Rusutsu resort to Toyako onsen.

Therefore you might better call 0142-75-2351 (Donan bus Toyako branch). Probably your accommodation will help you.

Thank you very much for this information and the number. Actually, I was not able to find the contact. I will call them and ask about it.
Thanks a lot :)