Is it worthed?

Hi there,

Yes, I think it can be worthwile getting a 7 day JR Pass. The pass is about the same price as a return with the Shinkansen from Kyoto to Tokyo so if you use it for that, then any additional travel is free. Looking at your itinerary you could use it from day 2-8. You can also use your JR-Pass to Kansai Airport if you fly from there!

Please note that the travel to lake Kawaguchiko is not covered by the JR Pass, because only non-JR railway/bus companies go there. When you are in Tokyo, I would recommend taking the High Way Bus from Shinjuku to travel to Kawaguchiko.

Hope this helps!
-Daniel