Please help, should we buy the 7 day or 14 day JR pass - Itinerary inside

We're planning to do 14 days in Japan.

Week 1
* 5 days travelling around Tokyo * 1 day Tokyo --> Nagoya --> Kyoto Week 2:
* 2 days in Kyoto * 4 days in Osaka * 1 day Osaka --> Yokohama --> Tokyo

Then return to Tokyo and fly home.

Does a 14 day JR pass make sense in this trip? or should we buy individual train passes around Tokyo, then use the 7 day JR pass for week 2?

Any help would be appreciated!