: 123456, 123456789, 1234, and 12345678.
The data is clear: relying on human memory alone leads to predictable, easily cracked passwords. Security experts agree on a set of foundational strategies to counter these evolving password lists.
These common passwords can be cracked in less than a second by automated brute-force attacks, as shown in studies by Nord Security and Huntress . Using names or popular terms makes a user vulnerable to and dictionary attacks . The Reality of Cybersecurity in Japan (2026)
Add a localized, up-to-date password resource for Japanese-speaking users that helps them create, evaluate, and manage strong, culturally aware passwords. The feature provides a curated list of commonly used weak passwords in Japan, localized guidance for secure password creation, education on current attacker patterns, and integrated checks in password creation and breach-detection flows.
While global favorites like "123456" remain common, Japan-specific data highlights a preference for longer numeric strings and Romaji (Japanese in English letters) words. japanese password list updated
As of June 2026, the cybersecurity landscape in Japan continues to face significant challenges from weak password practices, with updated breach data revealing that many users still rely on predictable combinations. Despite increased awareness, analyzed datasets from 2025 and early 2026 show a persistent trend of simple, easily guessable passwords being used across personal and corporate accounts.
Credential stuffing relies on automation to test lists of leaked usernames and passwords across various websites. When attackers utilize an updated, region-specific list, their success rate spikes dramatically for several reasons. Attack Vector Global Wordlist Performance Updated Japanese Wordlist Performance Low efficiency; misses cultural nuances. High efficiency; captures localized user habits. Bypassing Basic Filters Caught by standard "common password" blocks. Bypasses filters that only screen English words. Account Takeover (ATO) Rate Stagnant or declining. Exponentially higher on Japanese domains ( .jp ).
Source: ScanNetSecurity
Current data suggests that localized "wordlists" used by hackers now specifically include Japanese slang and pop culture references. To counter this, the updated security consensus for 2026 recommends: : 123456, 123456789, 1234, and 12345678
The updated Japanese password list for 2025 is a warning. The prominence of admin and personal names demonstrates a critical need for better security practices. By understanding the risks and adopting the outlined defenses, you can take immediate and effective action to protect your digital life.
: Simple, lowercase romanized first names are heavily utilized: 🛡️ Best Practices for a Secure Password
These tools generate and store strong, unique passwords for every site, mitigating the risk of reuse. 4. Best Practices for Companies and Individuals
Just like "qwerty" in English, Japanese users often use sequential keys. asdfghjkl 12345678 password (written as pasuwado or simply pw ) 📈 Why Japanese Passwords Are Targeted These common passwords can be cracked in less
企業の社内システムや共有アカウントで最も頻発するパターンです。 company2026 （会社名 ＋ 西暦） tokyo2026 （都市名 ＋ 西暦）
Japanese users prioritize convenience when setting passwords, often avoiding "the effort of creating unique passwords". The primary reason for password reuse is the fear of forgetting different passwords, with 74.3% of users citing this as a major barrier to better practices. Additionally, only 10.8% of Japanese consumers use a dedicated password manager, with most relying on memorization or paper notes.
Ensure every active account requires a secondary approval code. For Organizations and Businesses