: Simple politeness carries over into security with arigato (thank you) and yokoso (welcome).
If you'd like, I can help you for your team or provide a list of Japanese-language security resources for further reading.
and security researchers, the most frequently used passwords in Japan mirror global trends in simplicity, but with local variations: nippon.com (Persistent #1 globally and in Japan) (A "keyboard walk" pattern descending from the top-left) (Cherry blossom) (Common Japanese personal names) (Popular anime/manga franchises) (Sunflower) Key Cultural Characteristics
Do not rely on default Active Directory or identity provider (IDP) blacklists. japanese password list updated
Instead of one word, use a sentence in a mix of languages or dialects. ❌ sushi123 ✅ I-love-Eating-Sushi-In-Kyoto-99! Enable Multi-Factor Authentication (MFA)
: 2/5 – Concept valid, but almost all available are stale, incorrectly localized, or just English lists rebranded. For real updated data, you need automated pipeline from fresh leaks or password survey data.
Recent research indicates that Japanese user-created passwords exhibit greater dispersion than English or Chinese counterparts. However, specific vulnerabilities persist: : Simple politeness carries over into security with
Japanese users continue to rely on easily guessed passwords, with a culture that prioritizes convenience over security. This is reinforced by a high rate of password reuse, with of Japanese users in 2026 admitting to reusing passwords across multiple services.
: Whether it's your home Wi-Fi router, a new smart device, or any piece of equipment, never leave the default credentials in place.
: Most are superficial updates – renamed old lists or filtered common English lists. None reflect 2025+ real-world breaches. Instead of one word, use a sentence in
3. 最新のパスワードクラック（解析）技術の脅威
Analysis of recent Japanese-specific datasets reveals unique, culturally grounded password choices: Romaji Names and Terms