I'm trying to figure out how to get from Tokyo to the Fuji Shibazakura Festival. As best I can tell from Google Maps I will need to take the Oedo line from Tokyo to Kawaguchiko, but I'm unclear on how to get from Kawaguchiko to the park. I'll have a Japan Railway pass, so preferably I'd like to take a train.
The festival site is not accessible by train, so you have to take a bus (as indicated on the "Access" page of the festival's website), which will not be covered by your JR Pass.
By the way, note that Kawaguchiko station is not on a JR line, so trains to Kawaguchiko are not fully covered by your JR Pass either (specifically, the fare for the section between Otsuki and Kawaguchiko must be paid).