Should I get a JR-7 day pass for the following itinerary:
25 Dec - 29 Dec: Tokyo
30 Dec - 2 Jan: Fukuyama/Shinjuku
2 Jan - 4 Jan: Fujisan (five lakes)
5 Jan - either Karuizawa/Tokyo
6 Jan - Depart from Tokyo
Also, how should I get to Fujisan (five lakes region) and Karuizawa?
Thank you so much!