itinerary Check for JR Pass

My itinerary is as follows

11 Dec - Narita - Takayam
12 Dec - Takayama
13 Dec - Takayma - Lake Kawaguchi
14 Dec - Mount Fuji Area
15 Dec - Lake Kawaguchi - Tokyo (Staying near Takadanobaba)
16 Dec - Disney Resort
17 Dec - Yokohama
18 Dec - Tokyo
19 Dec - Narita Airport

is it worthwhile to get the Jar pass. For Takayama to Lake Kawaguchiko, the plan is to take the highway buss as it is shorter distance and direct.