The following are real examples from the . If any match your current passwords, change them immediately.
本記事では、最新の調査データに基づく「日本国内で最も破られやすいパスワードの傾向」と、セキュリティを劇的に向上させるための具体的な対策を徹底解説します。
: 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. japanese password list updated
This Japanese data reflects a global problem. The most common password worldwide in 2025 was, yet again, "123456", and an astonishing 25% of the top 1,000 global passwords consist solely of numbers. However, Japan stands out for the prevalence of "admin" as its number one, hinting at a unique combination of legacy default settings and a high number of unconfigured IoT devices, alongside the strong cultural tendency to use names and pop culture references.
Using generic global password dictionaries (like RockYou) is no longer sufficient for enterprises operating in Japan or managing Japanese user bases. Localized threat actors specifically utilize updated regional lists to bypass authentication hurdles. The following are real examples from the
A 2026 survey by Trend Micro found that a staggering 84.3% of Japanese users admit to reusing passwords across multiple accounts, up slightly from 83.8% in 2023. This reveals a dangerous normalization of poor security hygiene that cybercriminals actively exploit.
To maximize the effectiveness of a Japanese password list, follow these best practices: Free tools like Have I Been Pwned (haveibeenpwned
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
Konnichiwa (Hello), Arigatou (Thank you), or Daisuki (I love you).
: "Sakura" (cherry blossom), "Himawari" (sunflower), and " Doraemon " (manga character) frequently appear in the top 50 .
