JR pass worth it and what to do in Tokyo & Kyoto

Hi,

My partner and I arrive in Tokyo next Friday for 3 nights then to Kyoto for 3 nights then to Osaka to catch a flight to Sapporo for a couple of nights before heading to Nesiko and on to Furano.

As we plan to stay in and around Tokyo during our 3 days we are not sure if its worth getting a JR pass. We plan on taking the bullet train to Kyoto and then onto Osaka a few days later. Can you confirm what our best option is? And are there any day trips from Tokyo we should consider?

I also understand the Festival of Lights is on while we are there. Is this easy to get to and is it worth going? Are you also able to reccomend a really good restuarant in Tokyo for a celebration dinner. I hear everywhere is great but we are looking for somewhere extra special.

If you are also able to make a reccomendation in Sapporo and Nesiko for dinner would be great. We will be in Neisko for Christmas day.

Any other suggestions of what not to miss in any of the places I have mentioned would also be greatly appreciated.

Many thanks

Lana