Which pass to buy

sm2410

I am travelling as per the following itinerary
Delhi/Osaka Itami/Kyoto.......11april 2020, staying in kyoto for 4nights and making a side trip to nara.
Kyoto/Lake kawaguchiko......15april 2020, staying 1night
lake Kawaguchiko/ Tokyo.......16april 2020, staying 5 nights
leaving for delhi from Haneda on 21april 2020.

Tenjin

No JR Rail pass can help you with a one way itinerary like this. Just get regular fare tickets. But on the bright side, you don't have to waste time going back to Kansai just to catch a plane. Getting to the Fuji 5 Lakes area though is going to be rather painful. This info will help you:
https://www.japan-guide.com/e/e6905.html?aFROM=2158_6900

A Hankyu rail pass might save you some money for the Kansai area:
https://www.kansai360.net/m/en/ticket.html
Or maybe the 2 day Kintetsu Rail Pass:
https://www.japan-guide.com/e/e2357_006.html