Getting to Shirakawago from Takayama at end of December – is Nouhi bus the same company as Japan Bus Online?

^{Hey all,}

was just starting to making bookings for my trip. I planned on going from Takayama to Shirakawago on Dec 29, Shirakawago onwards to Kanazawa later that day.

However I just noticed on the Nouhi bus website that it lists Dec 29-Jan 2 as being closed for the holidays.

Japan bus online doesn't have such a disclaimer but it seems like it lists some Nouhi stations/has Nouhi buses in their photos. So, my question is, is Japan Bus Online just a different website to book Nouhi bus and therefore they're likely closed during that time period as well, or are they seperate and possibly operating during that time frame?

Thanks!