Tokyo > Kawaguchiko > Osaka > Tokyo

Hello, my bf and I are visiting Japan in 3 weeks. We were wondering if it is worth it to purchase a 7 day JR Pass for our itinerary. Also, what type of JR Pass would we need?

We will be arriving at Haneda and staying in Tokyo for the first 3 days. Then we plan to go to Kawaguchiko for 2 days. After, we will be spending 3 days in Osaka. Then back to Tokyo for our last day to catch our flight home.

Thanks in advance!