7 day pass or not?

Hi, i am travelling to Japan on December with my family of four.
i am wondering if it would be practical for us to avail of the 7 day JR Pass.

Here is my itinerary.

Day 1 : Arrive at Kansai airport osaka to namba hotel
Day 2 : USJ
Day 3 : city centre tour/ osaka castle /dotonburi
Day 4 : Kyoto and back to osaka
Day 5 : Nara and back to osaka
Day 6 : Tokyo, shinjuku
Day 7 : Mt. Fuji
Day 8 : Tokyo
Day 9 : Depart from Narita airport Tokyo

Thank you in advance for your advice.
:)