Yes, a standard Suica card issued by JR East can be refunded, but the process and amount depend on the specific type of card you have. For a regular Suica (the green plastic card), you can return it to any JR East "Midori-no-madoguchi" ticket office. When you do, you will receive a refund of the remaining balance plus the ¥500 deposit. However, a ¥220 handling fee is deducted from the balance first. If your balance is less than ¥220, you won't get any balance back, but you will always get the full ¥500 deposit. It is a smart move to spend your balance down to zero at a convenience store before returning it to maximize your money. Note that the Welcome Suica (the red tourist card) is non-refundable and expires after 28 days, though you get to keep it as a souvenir. Mobile Suica (on iPhone or Android) can also be "refunded" through the app, but this typically requires a Japanese bank account for the transfer, making it difficult for short-term tourists to process.