[Need advice if should buy 7-day JR Pass]

I would like to seek advice if i should buy the 7-day JR Pass. My itinerary are;

6 Nov - arrive KIX and then take a train to Nagoya.  In the evening, take a train from Nagoya to Takayama

7 Nov - travel around Takayama but mainly via buses

8 Nov - Take a bus to Shirakawa-go. In the afternoon take a train to Osaka

9  Nov - Take a train to Osaka Universal Studio

10 Nov - Travel around Osaka; may or may not use train

11 Nov - Travel to Nara

12 Nov - Travel to KIX to catch a return flight

Thank you.