Most standard "top 100 worst passwords" lists are dominated by English words like "password" or "qwerty." While these are still used in Japan, standard global filters often miss localized patterns.
① パスワードマネージャー（管理ツール）の導入
To maximize the effectiveness of a Japanese password list, follow these best practices:
Source: ScanNetSecurity
Dates formatted in the Japanese calendar style are highly prevalent. Many passwords use the birth year combined with the current era year (such as Reiwa dates). Reuse Across Local Services
どのような**Webサービスやシステム（例：WordPress、社内Active Directoryなど）**の対策をお考えですか？ Share public link
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 japanese password list updated
The most comprehensive recent survey of Japanese password habits comes from NordPass, compiled in collaboration with cybersecurity researchers. The report analyzed data from 2024 to 2025, sourced from publicly available data breaches and dark web repositories across 44 countries.
Updated regional lists heavily incorporate local brands, pop culture phenomena, and corporate structural trends. Media and Entertainment
Many Japanese sites have unique rules:
Encourage passphrases consisting of multiple unrelated words rather than a single predictable Romaji word with a forced capital letter and symbol (e.g., changing Sakura2024! to a longer, complex sentence structure).
konnichiwa (hello), arigatou (thank you), ohayou (good morning).
) often criticize the restrictive password policies of some large Japanese companies. Many sites reportedly: Disallow special symbols (e.g., Most standard "top 100 worst passwords" lists are