Japanese Password List Updated

どれだけ強力なパスワードを設定しても、フィッシング詐欺などで文字列そのものが盗まれてしまえば意味がありません。以下の2点を徹底してください。

Do not use personal information, common romanized Japanese words, or simple keyboard sequences.

Attackers use the real names and emails from the list to craft highly convincing fraudulent emails. These emails mimic trusted institutions like Japan Post or major local credit card companies. Session Hijacking japanese password list updated

Japanese wordplay frequently assigns phonetic values to numbers. This allows users to create memorable numeric strings that correspond to phrases. Cybersecurity experts prioritize these sequences in updated lists: 4649 : Read as Yo-Ro-Shi-Ku ("Nice to meet you").

The dark web constantly updates localized wordlists. Threat actors use these specialized Japanese password lists to launch automated credential stuffing attacks against domestic targets. The dark web constantly updates localized wordlists

| Aspect | Previous Version | Updated Version (2026) | |--------|----------------|------------------------| | | ~3.5 million | ~5.2 million | | New entries | – | ~1.7 million | | Contextual passwords | Basic (e.g., sakura , toukyou ) | Expanded (anime titles, train station names, birth era phrases) | | Keyboard patterns | qwerty variants | QWERTY + kana keyboard patterns (e.g., たちつてと ) | | Leetspeak substitutions | Limited | Common (e.g., pa55w0rd , sakur4 ) | | Date formats | YYYYMMDD only | Mixed (Japanese era: R060412 , H310412 ) |

Attackers use these lists to test the same password across thousands of websites, relying on the fact that users reuse passwords. change those passwords immediately and

: Regularly verify if your email or passwords have appeared in known data breaches. Free tools like Have I Been Pwned (haveibeenpwned.com) allow you to search your email address across over 12 billion breached accounts. If a search indicates your credentials are compromised, change those passwords immediately and, if you ever reused them anywhere else, change them there too. This simple practice is one of the most effective ways to stay ahead of attackers using password lists.

MFA invalidates the utility of password lists by requiring a secondary verification method, such as a hardware token or authenticator app code.

Understanding how attackers use password lists is crucial for defense. Security professionals use this knowledge ethically to strengthen systems through . Key resources for this include: