Japan 2020 in Green Car and Gran Class

I will be in Japan in 2020 and would like to travel on the newest, fastest trains in Green Car or Gran Class. Here are the routes:

6/30/2020 - Transfer from NRT to Shibuya

All over Tokyo by metro for 6 days

Round trip - Day trip Tokyo - Yokohama

One Way - Tokyo - Nagoya

One Way - Nagoya - Kyoto

One Way - Kyoto - Osaka

One Way - Osaka - Tokyo

All over Tokyo for 3 days by metro

7/18/2020 - Transfer from Shibuya to NRT

Again, newest, fastest trains in Green Car or Gran Class.