From October 11, 2022, all returnees and entrants are required to show either a valid COVID-19 vaccination certificate of three doses of vaccines prescribed on the Emergency Use List of the World Health Organization (WHO) or a certificate of the negative test result of pre-departure COVID-19 test conducted within 72 hours before departure from the original country/region.

To Check Covid Guidelines etc. ( RTPCRs, Double Vaccine ( or triple ) )

Distance b/w stations and actual spots?

27 Reaching Tokyo: Going to Kyoto 8500 INR train to Kyoto (one way) - use JR pass ( 4D avatar ??)
28 Go to Osaka (Universal Studios 4-5 hrs, Aquarium, etc., cheesecake) 1700 INR ( to and fro) - use JR pass
29 Go to Nara ( Temples, Deer Parks), Birthday Shrey 850 INR ( to and fro) - use JR pass
30 - 2 Go to Hokkaido ( Celebrate New year, Skiing, Drift Ice, ryokan, etc. ) 19000 INR ( to and fro ) - Flight. Accommodation :
2 - later half of the day Again Roam Kyoto
3 Go to Kobe ( Possibly via road . Cuisine etc., cruise road)
4 - 5 Shirakawa Go (too far away !!): Bus and stay
5-8 Tokyo: yokohoma, nikko 8500 INR train to Kyoto - use JR pass 7000 per head for 3 nights

https://www.timeout.com/tokyo/travel/best-ski-resorts-and-snowboard-resorts-in-japan