Should I buy the 7 or 14 day pass according to my itinerary or shouldn't buy it?

Hi,

I'm traveling to Japan for 1st time in October. I'm staying 16 days. Below is my itinerary :

Day 1: Narita - Tokyo
Day 2-3: Explore Tokyo
Day 4: Tokyo - Matsumoto - Tokyo
Day: 5: Tokyo - Kamakura - Tokyo
Day 6-7: Explore Tokyo, then Tokyo - Kyoto
Day 8: Explore Kyoto
Day 9: Kyoto - Nara - Kyoto
Day 10: Explore Kyoto
Day 11: Kyoto - Osaka and explore Osaka
Day 12: Explore Osaka
Day 13: Osaka - Himeji - Osaka
Day 14-15: Explore Osaka and Osaka - Tokyo
Day 15: Explore Tokyo
Day 16: Tokyo - Narita

Should I buy it and if is the case, should I buy the 7 o 14 days?

Thank you!