You will need your passport (number and country) and a credit card in your name.
You can make free online seat reservations for Shinkansen and limited express trains as soon as your purchase is confirmed. how to buy jr pass in japan
Major "Travel Service Centers" or ticket offices (Midori-no-madoguchi) at: You will need your passport (number and country)
Narita (Terminals 1, 2, 3), Haneda (Terminal 3), and Kansai International . Major Stations: Tokyo, Shinjuku , Shibuya, Osaka , and Kyoto . Haneda (Terminal 3)