Can I get a refund on an IC card?

Possibly, but policies differ by card and operator and have changed over time. Some cards may be refundable and some may not, and any refund may involve a fee or conditions, so do not assume you will recover your full balance at the end of your trip. Confirm the current rules with the issuing operator, such as the railway company, before you buy. The safest approach is to load modest amounts at a time and plan to spend the balance down toward the end of your stay.¹