Japanese Password List Updated Portable Jun 2026

Consistently the top offenders, used across various platforms.

Implementation tip: Do not block every single entry (e.g., tokyo is too common as a substring). Instead, block exact matches and fuzzy variants (leetspeak, reversed).

また、最新の「updated（更新版）」リストには、過去に日本の大手ECサイトやSNSから漏洩した本物のパスワードデータが蓄積されているため、ユーザーが「自分なりに工夫したつもり」のパスワード（例：単語の最後だけ数字に変えるなど）も、AIやアルゴリズムによって簡単に見破られてしまいます。 japanese password list updated

キーボードのキーを順番になぞるパターン（通称：キーボードウォーク）は、世界共通の脆弱なパスワードですが、日本には「JIS配列（日本語キーボード）」特有のパターンが存在します。 qwertyuiop （英数配列の最上段） asdfghjkl （英数配列の中段）

Japanese Password List Updated: Top Security Risks and Best Practices for 2026 For Japanese users and organizations, the path forward

Restrict the number of login attempts permitted from a single IP address to block automated bots.

The "Japanese Password List" serves as a reminder that human behavior is often the weakest link in the security chain. While cultural nuances provide a localized flavor to credential sets, the underlying issue remains a preference for memorability over security. For Japanese users and organizations, the path forward involves a combination of MFA adoption and the phasing out of human-generated passwords in favor of machine-generated, high-entropy strings. for Japan or see a comparison of Japanese vs. Global top 10 password lists? Strong Passwords For Japanese users and organizations

: Combinations like "Fuyu2017" (Winter 2017) or month-based strings like "1Tsuki2016" (January 2016) are common variations.

Understanding these password lists is not a theoretical exercise. Real-world attacks are being executed right now, using lists exactly like those described above.

Many users type Japanese words using the English alphabet. Common entries include: