Takayama to Magome

Hi, on some trip is advertised a bus going from Takayama to Magome, then you can trek to Tsumago and then a bus to Kanatsugawa. On the Nohi bus company however there is no timetable or news about this route. Anyone can tell me how to do that?

There used to be a direct bus before corona. It is not operated this year. Your alternatives are explained here:
https://www.japan-guide.com/e/e6079.html?aFROM=5900_6075

Thank you, but I do not know how to find the bus from Gero Onsens to Kashimo Sogojimusho-mae as described in one of the options

It's the 下呂加子母線 section on this page: https://www.nouhibus.co.jp/routebus/#gero-route

For reference, if you want to find it by yourself next time: look up 加子母総合事務所前 (from Uji's link) on Google maps. This gives you a bus stop, with the next scheduled departures. Among them, there is a bus for "Gero bus center". At the bottom of the schedule, there's a link to Nohi Bus, where I just searched for 加子母.