Incoming Aomori JET from the US here. I know it's difficult to get a Japanese credit card within your first year in Japan, and I also heard debit cards in the American sense aren't really a thing in Japan? I'm wondering then how people book flights/hotels for any vacations or shop online. Do you use your home credit or debit cards and then just wire money back to your account later, or is there something I'm missing that's less convoluted? Obv things like shinkansen can be paid in cash.