The most commonly used App is called "LINE", which is equivalent to "WeChat" in China.

Of course, many people also use Skype applications.

In addition, Japanese banks also have "mobile banking" software.

More importantly, the Japanese transportation card "SUICA" is not limited to paying transportation expenses, but can be purchased in many vending machines and convenience stores, which is equivalent to a cash card. Now "SUICA" also has a mobile App, similar to "Alipay".

There is also the mobile APP of YahooJapan, the App of Lotte Market, Japan's largest shopping website, and the mobile App of Amazon.