Bus to Zao Onsen on Sunday

Hi All,
I was wondering if someone may be able to clarify the bus times from Yamagata Station to Zao Onsen on Sundays. I have seen a web site that says the yamako bus to Zao Onsen doesn't run on Sundays is this correct?
On other websites it doesn't mention any restrictions. I was planning to travel on the Sunday but if the bus doesn't run I will need to find a different way to get from Yamagata Station. I hope someone may have some experience traveling there on weekends.
Thank in advance

Here's the time table of Yamakō bus. As you can see, they run also on Sundays (the red table).
山交バス／路線バス時刻表

Toritoribe said:

Here's the time table of Yamakō bus. As you can see, they run also on Sundays (the red table).
山交バス／路線バス時刻表

Click to expand...

Thank you toritoribesan that is such a relief.
I thought I might have to arrange a private shuttle or similar and you know how the price would start to climb....
Thank you!

I've got here some guide to reach the place!