Managing passwords is tricky anywhere, but in Japan—where you may juggle romaji, kana, kanji usernames, and services like LINE, PayPay, Rakuten, or My Number Portal—staying organized is critical. Below is a practical guide to maintaining an updated password list without compromising security.
If you are looking for this information to secure your network, consider the following defense measures against these lists:
Disclaimer: This information is provided for educational and security defense purposes only. Using password lists to access systems you do not own or have explicit permission to test is illegal.
Recent reports and academic papers from early 2026 reveal that Japanese password habits remain dominated by simple numeric sequences, though they show unique cultural and keyboard-based patterns compared to Western users. Top Japanese Passwords (2025–2026)
While global favorites like "123456" remain common, Japan-specific data highlights a preference for longer numeric strings and Romaji (Japanese in English letters) words.
123456789 – Often the #1 password in Japan, favored for its perceived (but false) safety due to length.
123456 – The perennially most common password globally and a top-three choice in Japan.
password – Extremely frequent in corporate and personal settings.
1qaz2wsx – A "keyboard-walk" pattern where users type vertically on a QWERTY keyboard.
sakura – (Cherry blossom) One of the most popular cultural terms used in passwords. japanese password list updated
himawari – (Sunflower) Common flower name found in multiple leak datasets.
doraemon – A prime example of anime/manga names appearing in the top 50.
hiromi / miyuki – Personal names are frequently used by Japanese users. 🔬 Academic Findings on Japanese Passwords
A comprehensive study published in January 2026 analyzed 48.5 million leaked Japanese passwords, identifying several distinctive characteristics: Key Characteristics
High Dispersion: Unlike English or Chinese users, Japanese users don't flock to a single "top" password. The #1 password typically accounts for less than 0.4% of any given dataset.
Length Preference: 85% of Japanese passwords are between 6 and 10 characters long, with 8 characters being the absolute most frequent length.
Keyboard Patterns: Japanese users frequently combine multiple keyboard-walks (e.g., asdf12345), a habit more prevalent than in other language spheres.
Numerical Trends: Japanese users often incorporate dates, particularly birth years or the year the password was set. Suggested Improvements
Research on Japanese Mnemonic Passwords suggests that users can create 14–18 character passwords by remembering a simple 6–8 character Japanese sentence and two numbers, significantly increasing security without losing memorability. If you'd like, I can help you: Draft a summary of this data for a presentation Managing passwords is tricky anywhere, but in Japan—where
Analyze specific patterns like how cultural words (e.g., "sakura") compare to Western ones
Look for tools to help you generate or manage stronger passwords
Current Japanese password trends as of April 2026 show a significant gap between security best practices and common user habits. Recent studies, including a January 2026 report in Springer Nature
, indicate that Japanese users exhibit a high reliance on specific linguistic patterns and keyboard walks. Springer Nature Link Top 2026 Trends & Common Choices
While security awareness is rising, many Japanese users still use highly predictable passwords. The most recent data highlights several categories: Keyboard Walks: Patterns like "1qaz2wsx"
(keys in vertical or diagonal order) are extremely prevalent among the most used passwords in the region. Simple Numeric Strings:
"123456" remains the top-ranked password, followed closely by "password" and "1234". Cultural & Pop Culture Terms: Common choices include names like , floral terms like (cherry blossom), and anime references such as "doraemon" Unique Dispersion:
Japanese passwords show greater dispersion (variety) than English or Chinese lists, but still fail due to the high frequency of these common cultural markers. Springer Nature Link Password List Resources (Updated)
For security researchers or those interested in defensive auditing, several updated repositories provide Japanese-specific wordlists: Weakpass [Japanese.dic]: Mandatory Complexity: Enforce a policy requiring Kanji or
A comprehensive, frequently updated dictionary for Japanese-specific terms. GitHub Repositories: Ignis-Japanese-150
: A focused list of common Japanese-specific password variations. Greenwolf/Spray
: Contains localized password lists specifically for testing Japanese web service environments. SecLists [Localized]:
Includes crawled localized web pages to capture words missing from standard English-centric lists. Security Expert Observations Reviews from security communities (e.g., Reddit's r/japan
) often criticize the restrictive password policies of some large Japanese companies. Many sites reportedly: Disallow special symbols (e.g.,
Enforce numeric-only requirements, making brute-force attacks significantly easier. Expert Tip:
To significantly improve security, experts suggest moving away from simple Japanese word substitutions and adopting long, random passphrases (12+ characters) that include a mix of character types. for Hashcat) or a list for a particular industry
Many Japanese sites have unique rules:
✅ Tip: In your password manager, add a Notes field for: “Rakuten: no & or = allowed”, or “Myna PIN: 123456”.
Based on current trends, the next update will likely include:
The frequency of updates will shift from annual to quarterly as automated combo list generators become AI-assisted.
Managing passwords is tricky anywhere, but in Japan—where you may juggle romaji, kana, kanji usernames, and services like LINE, PayPay, Rakuten, or My Number Portal—staying organized is critical. Below is a practical guide to maintaining an updated password list without compromising security.
If you are looking for this information to secure your network, consider the following defense measures against these lists:
Disclaimer: This information is provided for educational and security defense purposes only. Using password lists to access systems you do not own or have explicit permission to test is illegal.
Recent reports and academic papers from early 2026 reveal that Japanese password habits remain dominated by simple numeric sequences, though they show unique cultural and keyboard-based patterns compared to Western users. Top Japanese Passwords (2025–2026)
While global favorites like "123456" remain common, Japan-specific data highlights a preference for longer numeric strings and Romaji (Japanese in English letters) words.
123456789 – Often the #1 password in Japan, favored for its perceived (but false) safety due to length.
123456 – The perennially most common password globally and a top-three choice in Japan.
password – Extremely frequent in corporate and personal settings.
1qaz2wsx – A "keyboard-walk" pattern where users type vertically on a QWERTY keyboard.
sakura – (Cherry blossom) One of the most popular cultural terms used in passwords.
himawari – (Sunflower) Common flower name found in multiple leak datasets.
doraemon – A prime example of anime/manga names appearing in the top 50.
hiromi / miyuki – Personal names are frequently used by Japanese users. 🔬 Academic Findings on Japanese Passwords
A comprehensive study published in January 2026 analyzed 48.5 million leaked Japanese passwords, identifying several distinctive characteristics: Key Characteristics
High Dispersion: Unlike English or Chinese users, Japanese users don't flock to a single "top" password. The #1 password typically accounts for less than 0.4% of any given dataset.
Length Preference: 85% of Japanese passwords are between 6 and 10 characters long, with 8 characters being the absolute most frequent length.
Keyboard Patterns: Japanese users frequently combine multiple keyboard-walks (e.g., asdf12345), a habit more prevalent than in other language spheres.
Numerical Trends: Japanese users often incorporate dates, particularly birth years or the year the password was set. Suggested Improvements
Research on Japanese Mnemonic Passwords suggests that users can create 14–18 character passwords by remembering a simple 6–8 character Japanese sentence and two numbers, significantly increasing security without losing memorability. If you'd like, I can help you: Draft a summary of this data for a presentation
Analyze specific patterns like how cultural words (e.g., "sakura") compare to Western ones
Look for tools to help you generate or manage stronger passwords
Current Japanese password trends as of April 2026 show a significant gap between security best practices and common user habits. Recent studies, including a January 2026 report in Springer Nature
, indicate that Japanese users exhibit a high reliance on specific linguistic patterns and keyboard walks. Springer Nature Link Top 2026 Trends & Common Choices
While security awareness is rising, many Japanese users still use highly predictable passwords. The most recent data highlights several categories: Keyboard Walks: Patterns like "1qaz2wsx"
(keys in vertical or diagonal order) are extremely prevalent among the most used passwords in the region. Simple Numeric Strings:
"123456" remains the top-ranked password, followed closely by "password" and "1234". Cultural & Pop Culture Terms: Common choices include names like , floral terms like (cherry blossom), and anime references such as "doraemon" Unique Dispersion:
Japanese passwords show greater dispersion (variety) than English or Chinese lists, but still fail due to the high frequency of these common cultural markers. Springer Nature Link Password List Resources (Updated)
For security researchers or those interested in defensive auditing, several updated repositories provide Japanese-specific wordlists: Weakpass [Japanese.dic]:
A comprehensive, frequently updated dictionary for Japanese-specific terms. GitHub Repositories: Ignis-Japanese-150
: A focused list of common Japanese-specific password variations. Greenwolf/Spray
: Contains localized password lists specifically for testing Japanese web service environments. SecLists [Localized]:
Includes crawled localized web pages to capture words missing from standard English-centric lists. Security Expert Observations Reviews from security communities (e.g., Reddit's r/japan
) often criticize the restrictive password policies of some large Japanese companies. Many sites reportedly: Disallow special symbols (e.g.,
Enforce numeric-only requirements, making brute-force attacks significantly easier. Expert Tip:
To significantly improve security, experts suggest moving away from simple Japanese word substitutions and adopting long, random passphrases (12+ characters) that include a mix of character types. for Hashcat) or a list for a particular industry
Many Japanese sites have unique rules:
✅ Tip: In your password manager, add a Notes field for: “Rakuten: no & or = allowed”, or “Myna PIN: 123456”.
Based on current trends, the next update will likely include:
The frequency of updates will shift from annual to quarterly as automated combo list generators become AI-assisted.
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