13 days travel - 2 week JR pass?

Hi!

I will be travelling for 13 days from Osaka to Tokyo in coming November. However, have not decided whether to buy full JR pass or just purchase single trip tickets because of the addition of Takayama stay. Need help!

This is what I have planned so far (roughly):

Day 1 - Arrival from airport to Osaka
Day 2 - Osaka
Day 3 - Osaka (Universal Studios)
Day 4 - Osaka to Kyoto
Day 5 - Kyoto (Day trip Nara)
Day 6 - Kyoto
Day 7 - Kyoto
Day 8 - Kyoto to Yarimikan
Day 9 - Yarimikan to Takayama
Day 10 - Takayama to Tokyo
Day 11 - Tokyo (Day trip to Nikko)
Day 12 - Tokyo (DisneySEA)
Day 13 - Tokyo
Day 14 - Tokyo to Haneda airport

What type of JR pass would you recommend to suit my itinerary? Thank you very much!

Regards,
YS