Tokyo Shinbashi Station to One Niseko Resort Tower

Japan Traveller Questions
1

Hi Team

I really need your advise here. I will be travelling with my wife and two kids and will stay at One Niseko Resorts Tower for 5 days.

  1. Travel route by Shinkansen and JR
  2. Can I take JR which covers all routes in Hokkaido during my stay at resort

I know flight is the best option to travel from Tokyo to Nikeso. But we want to experience Shinkansen and Train journey. appreciate if you could share a good route

Best Regards
Mani