Password Reuse in Japan: still at 84% [2026]

1. Introduction#

Trend Micro's Password & Passkey Usage Survey 2026 reveals a paradox in Japan's authentication landscape: 84.3% of web service users still reuse passwords across multiple accounts, yet 91.1% are now aware of passkeys as an alternative. The survey of 1,034 Japanese consumers aged 18-69, conducted in February 2026, found that 87.7% of users on passkey-enabled services actively use passkey authentication. Japan's shift from passwords to passkeys is accelerating, but old habits persist.

These findings come from Trend Micro's Password & Passkey Usage Survey 2026, published via Nikkei on 24 March 2026. For a broader analysis of Japan's passkey landscape including regulatory drivers and financial sector deployments, see the Passkeys Japan overview.

2. How widespread is password reuse in Japan?#

According to Trend Micro's 2026 survey, 84.3% of Japanese web service users reuse passwords across multiple services. This rate has barely changed from 83.8% in the 2023 edition of the same survey, showing that password reuse remains deeply entrenched despite growing awareness of authentication risks.

Of the 1,034 respondents, 43.3% use only 2-3 passwords, 13.5% use a single password for nearly every account and just 15.7% maintain a unique password per service.

The top reason for reuse is forgetting different passwords (74.3%), followed by the perceived effort of creating unique passwords (48.3%). These motivations point to a usability problem that password managers have not solved at scale - dedicated password manager usage in Japan stands at just 10.8%.

3. How do Japanese consumers manage their passwords?#

Japanese consumers primarily rely on memorization and analog methods to manage their passwords. In Trend Micro's 2026 survey, 40.9% of respondents said they memorize their passwords, making it the most common management approach. Paper notes and notebooks ranked second at 34.3%, followed by smartphone notes apps at 28.3%.

Digital tools lag behind analog methods. Browser-based autofill is used by 26.1% of respondents, while only 10.8% use a dedicated password manager. Another 9.7% store passwords in spreadsheet or document files, and 3.5% reported no management strategy at all. The low adoption of dedicated tools underscores why password reuse remains so persistent.

These habits also vary sharply by generation. Respondents aged 18-29 rely heavily on memorization at 50.2%, while those in their 60s prefer paper notes at 48.8%. Dedicated password manager adoption remains negligible across all age brackets.

Younger users who rely on memorization stand to benefit most from passkeys eliminating password recall entirely. Older users accustomed to paper-based management may need stronger nudges and clearer communication about device-based authentication.

4. What happens after an account breach in Japan?#

In Trend Micro's 2026 survey, 14.7% of Japanese web service users (152 out of 1,034 respondents) reported experiencing unauthorized access or a data breach. This marks a 3-percentage-point decrease compared to the 2023 survey, indicating a modest improvement in breach rates.

Post-breach behavior has improved noticeably. Among those affected, 50.7% changed the password on the compromised account - up 7.3 points from 2023. Another 21.7% changed passwords on all their accounts, an increase of 8.5 points.

However, only 19.7% enabled two-factor or multi-factor authentication after a breach, and 11.2% took no action at all. Password reuse makes credential stuffing attacks particularly dangerous: once one account is compromised, attackers test the same credentials across other services. The combination of 84.3% password reuse and low post-breach MFA adoption leaves many Japanese users exposed to cascading account compromises.

5. How aware are Japanese consumers of passkeys in 2026?#

Passkey awareness among Japanese web service users has reached 91.1% according to Trend Micro's February 2026 survey. Of that group, 41.9% understand how passkeys work, while 49.2% have only heard the name without deeper knowledge of the technology. This high recognition rate reflects sustained investment by industry bodies and Japanese service providers in consumer education.

The following funnel illustrates how awareness translates into active usage across the survey population.

Among the 733 respondents on passkey-enabled services, 87.7% (643 people) actively use passkeys - the primary drop-off is service availability, not consumer willingness. The FIDO Alliance has driven much of Japan's passkey awareness through its Japan Working Group, which includes 64 member organizations. Once a service enables passkeys, the vast majority of aware users adopt them. For context on which services have deployed passkeys in Japan, see the Passkeys Japan overview.

6. Why are Japanese users switching to passkeys?#

Convenience - not security - is the primary driver behind passkey adoption in Japan. In Trend Micro's 2026 survey of 643 active passkey users, 41.8% said they adopted passkeys because they are easier than two-step verification. The second most common reason, at 40.1%, was that entering passwords had become too tedious.

The grouped breakdown below reveals three distinct driver categories - and the dominance of convenience over security is striking.

Provider-driven adoption is significant too: 32.3% were prompted by a service recommendation and 27.7% by a mandate, while security concerns motivated only 19.6%. Convenience messaging resonates more than security warnings with Japanese consumers - a pattern consistent with passkey adoption research globally.

7. What concerns remain about passkey adoption in Japan?#

Device portability and recovery are the top concerns among Japanese passkey users. In Trend Micro's 2026 survey, 35.6% of respondents said they worry about transferring passkeys when changing devices. A similar 35.3% fear being locked out of their accounts if their phone is lost or damaged.

These concerns reflect a knowledge gap rather than a technical limitation. Modern passkey implementations sync credentials across devices through platform ecosystems such as iCloud Keychain on Apple devices and Google Password Manager on Android. The FIDO Alliance's multi-device credentials specification addresses cross-device portability directly.

Notably, 29.3% of respondents reported having no concerns about passkeys at all. The gap between concerned and unconcerned users suggests that clear communication about recovery procedures and cross-device sync can reduce adoption friction substantially.

8. What does the Trend Micro survey mean for service providers?#

The Trend Micro Password & Passkey Usage Survey 2026 sends a clear signal to Japanese service providers: users will adopt passkeys when prompted, but password habits will persist unless the industry actively intervenes. With 84.3% of users still reusing passwords and only 10.8% using a password manager, the security baseline remains fragile.

The 87.7% active usage rate among eligible users demonstrates that the supply-side bottleneck matters more than consumer reluctance. Service providers who deploy passkeys, communicate their benefits and provide clear device-recovery guidance can expect strong uptake. Addressing the 35.6% who worry about device transfers with explicit migration documentation is a practical first step.

For organizations evaluating passkey deployment in the Japanese market, the survey data reinforces that convenience-first messaging and proactive enrollment prompts outperform passive security-focused approaches. Financial institutions already leading this shift are documented in the Japan passkey rollout tracker.

9. Conclusion#

Trend Micro's Password & Passkey Usage Survey 2026, conducted among 1,034 Japanese web service users in February 2026, confirms two parallel realities. Password reuse remains at 84.3%, virtually unchanged from 83.8% in 2023, with memorization (40.9%) and paper notes (34.3%) still dominating password management. At the same time, passkey awareness has reached 91.1% and 87.7% of eligible users actively use passkeys. The survey data makes clear that service providers hold the key to Japan's passwordless transition: convenience-focused passkey prompts and clear recovery communication drive adoption far more than security warnings. The original survey was published by Trend Micro via Nikkei on 24 March 2026 (full PDF).

Frequently Asked Questions#

Why do Japanese consumers reuse passwords despite knowing about passkeys?#

The primary reason for password reuse in Japan is forgetting different passwords, cited by 74.3% of reusers in Trend Micro's 2026 survey. Despite 91.1% passkey awareness, only 10.8% use a dedicated password manager, leaving most users dependent on memorization or paper notes with no scalable solution for managing unique credentials.

What are the biggest barriers to passkey adoption among Japanese users?#

Device portability is the top concern: 35.6% of Japanese passkey users worry about transferring passkeys when changing devices and 35.3% fear account lockout if their phone is lost. These concerns reflect a knowledge gap rather than a technical limitation, since modern passkey implementations sync through platform ecosystems like iCloud Keychain and Google Password Manager.

How do post-breach security behaviors differ between 2023 and 2026 in Japan?#

Among the 14.7% of Japanese users who experienced a breach in 2026 (down 3 percentage points from 2023), 50.7% changed the compromised account password, up 7.3 points from 2023. However, only 19.7% enabled multi-factor authentication after a breach and 11.2% took no action at all, leaving many accounts exposed given the 84.3% password reuse rate.

How should service providers message passkeys to Japanese users to maximize adoption?#

Convenience-focused messaging outperforms security warnings for Japanese consumers: 41.8% of active passkey users adopted them because passkeys are easier than two-step verification, while only 19.6% cited security concerns. Service providers who actively prompt or require passkey enrollment drive higher uptake, with 32.3% of adopters saying their provider recommended passkeys and 27.7% adopting because the service required it.