You can look at the place of production and color difference.

The product is made in Japan. There will be a line in English in the lower left corner of the back of the card, which says the year of production and the country of origin, Japan. Then there is the mainland card that is common to Hong Kong, Macao and Taiwan. At the back and in the lower left corner, there will be a string of years and country of origin written in English. There is a certain color difference between the real card and the fake one. The real card will also have some fine glitter, large glitter blocks, fine glitter with frosting, etc.

Idol Activity is a new idol card arcade game jointly developed by Bandai, the creator of Idol Master, and its subsidiary Sunrise Animation. Players can hold the game IC card to create their own idol image, and can match their own headgear, clothing and background. Then they can complete various challenges to increase their fans and become the No. 1 idol in the country.