Bus schedules for Aoni Onsen and Nyuto Onsen

I'm going to Aoni and Nyuto onsens in Feb 2015. Any kind soul can give me the links to the bus schedules for going to and from these onsens? Thanks!

Nyuto Onsen has frequent buses from Tazawako Station. There is almost no need to know the timetable:
http://ugokotsu.co.jp/wp1/wp-content/jikoku/latest/nyuto.pdf

Access to Aoni Onsen is much more challenging:

Hirosaki to Kuroishi:
http://www.hyperdia.com/

Kuroishi to “ø‚ÌŒÎ:
http://konanbus.com/rosenbus_new/_kuro_aom/013.gif

From “ø‚̌Πit is a shuttle bus ride:
http://www.yo.rim.or.jp/~aoni/access/access.html