Ina to Kiso area

I'm planning a trip to Ina to viewing cherry blossom at Takato Castle Ruin and next my intention is to visit Narai in Kiso, I try to search about transportation around the town but cant found. so, Please let me know how to getting there from Inashi station to Narai by bus for fastest way?

http://takato-inacity.jp/cms3/sakuramaturigo.pdf1.pdf
高遠 is takato
伊那北駅 is inakita station.

This could be last year schedule.

Thank you guear, but my trouble point is looking for route bus from Ina to Narai, because I saw on the map that has a highway road link between the towns.

I searched around but I couldn't find any bus between narai and inakita. Unless someone else know, you might have to take train. You could try asking the local people. You could try to call number listed at the bottom but I fear they might not speak English.
http://www.naraijuku.com/narai/index.html

Thank you for your suggestion guear, It seems to be the only choice that I can do.