The official currency in Osaka is the Japanese Yen (JPY). It's advisable to exchange some cash in advance as smaller shops and local markets often prefer cash payments. ATMs are widely available, especially in convenience stores like 7-Eleven, which accept international cards. Credit cards are commonly accepted in larger hotels, department stores, and restaurants, though smaller establishments may only accept cash. Mobile payment options such as Suica, Pasmo, and PayPay are increasingly popular among locals and tourists alike, offering convenient cashless transactions. Keep an eye on exchange rates to get the best value when converting money, and always notify your bank about your travel plans to avoid card issues.