A few nice prepaid credit card images I found:
Image by Andres Rueda
#105 Suica rechargeable IO (イオ) card for JR East
Image by Nemo’s great uncle
This non-contact (RFID) IC card ("smart card") holds up to ¥20,000 in electronic money ("e-cash") for JR East train lines [Japanese], kiosks, and other 駅中(ekinaka) facilities inside JR East stations.
"Super Urban Intelligent Card" (Suica, see Wikipedia: Japanese, English (old), Deutsch) is a multi-application platform (based on Sony’s Felica [English] technology*) for JR commuter passes, JR railway tickets, e-cash, building access, and other appliations.
* Other Felica applications include JR West’s ICOCA（イコカ） cards, Bit Wallet’s Edy cards, Kansai’s PiTaPa（ピタパ） card’s, Hong Kong’s Octopus (八達通) cards…
As of October 26, 2004, sales hit 10 million users—which is not all that many when one considers that, as of April 1, 2005, JR East not longer accepts their old prepaid "IO" or "Orange" cards. I had to fork over a ¥500 deposit for this card.
NTT DoCoMo has also come on board, with cell phones incorporating the commuter pass version of the IC. KDDI au, Japan’s #2 cellular operator, will follow in January 2006.
The latest news is that coverage with extend to bus companies in the Kantō Plain in 2006.
There are two ways to "charge" this card: (1) cash at a JR East ticket machine or (2) JR East branded View credit card at a VIEW ALTTE ATM corner or JR East ticket machine with a VIEW sticker.
First the cards were only for JR ticket machines. Next, kiosks and convenience stores inside stations started taking them. Now a Family Mart convenience store hundreds of meters from the nearest JR station it accepts both Suica and the older Quo prepaid cards.
• 西瓜(suika) = lit. "Western melon" = "watermelon"