Exchange Location / Activation Date / Required Documents

Hi,

Can I exchange to JR Pass at Midorino Madoguchi at Atami Station? Do I need to use the JR pass immediately after the exchange? I want to activate the pass a couple days after arrival. Wondering if I can exchange at Narita Airport and activate it later.

Also, I am a Japanese citizen and required to provide documents to prove my residency outside of Japan. Does copy of my tax document suffice the needs? I really feel uncomfortable bringing my original tax documents to JR office. I hope they don't take a copy of it. Also, how come they don't accept a drivers license?

Thank you,
SS