pass good for hiking Kawazu Nanadaru

Hi, I'm planning to visit Kawazu Seven Wateralls, and I was wondering if there is bus pass that covers Tokai Bus Kawazu Station - Shuzenji Station? I looked at the Odakyu passes for Izu area, and none seems to cover this (only small parts of it).

Thank you!

The Izu Free Q Kippu, which also includes an expensive train ride to/from Tokyo, seems to be valid on the entire bus ride between Kawazu and Shuzenji, although it is not shown on the map on the follwoing page:
http://www.japan-guide.com/e/e2358_006.html