Should we get 7 days or 14 days

Hi guys !!

I need guidance. I’m going to be in japan from September 7th untill the 21st. I’ll be going to Kyoto, Osaka, Nara, and Kobe in that time. To be exact I arrive in Tokyo the 7th than leave for Kyoto on the 10th and will be coming back to tokyo from Kobe on the 17th.

Now I’m trying to figure out if it’s worth me getting just a seven day pass in buying a ticket back to Tokyo from Colby or should I get the 14 day one?

What’s your suggestion !

Thanks in advance :)