required documents to use the rail pass

The requirement page says "you must bring your passport and proof using one of the required documents above" which for the U.S. says a permanent resident card. A permanent resident card is a green card issued to non-U.S. citizens. I included below the actual sections I am confused about.

"At the time of exchange in Japan, you must bring your passport, proof (as outlined above) that you have lived outside of Japan for at least 10 years, and your exchange order. "

"Permanent Resident Card (永住カード) issued by your country of residence. This is only a special case and limited to the USA, Brazil, and Canada. The date of recorded residence on the card should be at least 10 years."

I have a passport. Am I misunderstanding the need for both a passport and a resident card since it says I need both?