There are many types of credit card breaches in Japan, and some common methods include:

1. Cyber ??attacks: Hackers have invaded banks, retailers, healthcare institutions, etc. that have a large number of customers. organized credit card information and stole their credit card information.

2. Internal employees: Some breaches are caused by internal employees stealing customer credit card information.

3. Internet fraud: defrauding customers’ credit card information through online fraud activities, such as phishing emails, malware, fake websites, etc.

4. Theft: Some credit card information is stolen because customers forget their wallets or mobile phones, and these items contain credit cards.

5. Improper management: Some companies may not take adequate security measures to protect customer credit card information, and their websites, data processing methods, etc. may have loopholes. The best way to protect personal credit card information is to take appropriate precautions, such as not disclosing credit card information casually, choosing trustworthy websites when shopping, updating operating systems and software in a timely manner, and checking your credit card statements regularly, etc.