TOKYO, Japan (Sep 2026) – Banking apps and official systems are getting harder to breach, forcing cybercriminals to target the interconnected web of third-party vendors, fintech partners, and telecom companies handling financial data.
To combat this growing threat, regulatory authorities are demanding that financial institutions take full responsibility for every external pipeline connected to their systems. Japan’s Financial Services Agency recently urged banks to look beyond direct vendors and evaluate the security of all data partners, mirroring stricter guidelines already active in the United States, Europe, and the United Kingdom.
The weak link in modern banking
Japanese banks stopped building every software tool internally years ago. While integrating third-party fintech and telecom tools expanded customer convenience, it also created thousands of external access points for hackers to exploit.
Data from Japan’s National Police Agency revealed 4,677 cases of illegal internet banking transfers in 2025 alone. These incidents caused losses totaling approximately 10.2 billion yen (approx. PHP 3.9 billion / $68 million), marking record highs for both occurrences and financial damage. Phishing remains the primary weapon used to hijack credentials for these unauthorized transfers.
With artificial intelligence accelerating how fast bad actors identify system vulnerabilities, defense windows have collapsed from months down to minutes.
Treating identity as the new perimeter
Security experts emphasize that financial organizations can no longer rely solely on perimeter firewalls. Takanori Nishiyama, Senior Vice President for Asia-Pacific at cybersecurity firm Keeper Security, noted that every human user and automated system interacting with a bank must be secured.
Institutions need to audit every partner pipeline and rank them by risk level. Security expectations, such as strict encryption rules and mandatory audit rights, must be legally enforced in contracts.
Removing permanent access
To limit the damage of potential leaks, cybersecurity leaders advise implementing least-privilege access across all vendor connections. Instead of handing partners permanent administrative rights, systems should grant temporary access that expires as soon as a specific task finishes.
Multi-factor authentication and privileged access management should cover every login point, including automated AI agents working within banking networks. Because consumers rarely separate a breach at a partner firm from a failure by the bank itself, securing every digital identity is the only way to preserve customer trust.
