Do I need the 7 day JR pass?

I will be in japan for 15 days. However, during my stay in Tokyo I will not activate it. I am thinking about going to Kyoto by bus during the night and reach in the morning to the same. Therefore, I wonder if it is worth it to use it the JR pass during that week in Kyoto, Hiroshima, Miyajima, then Osaka and finally going back to Tokyo for one more night by train.

Thank you in advance.