There are several ways to get online in Japan. Arguably, I would say most foreign tourists choose to have either SIM card or pocket WiFi. It is true that each option has undeniable advantages. For example, you may feel a way comfortable when decided to buy prepaid SIM card since it is disposable. On the other hand, renting pocket WiFi will allow you to share one router with others so that you can save travel budget. In this article, we will look for the definition of SIM card/pocket WiFi, and which one is better to use.