Open Banking in Japan

Japan's approach to open banking combines legislative reform with market-driven collaboration. The 2017 amendment to the Banking Act was a pivotal moment, introducing a registration system for Electronic Payment Service Providers (EPSPs) and requiring banks to publish open API strategies. The Japan Financial Services Agency (JFSA) set an ambitious target for at least 80 banks to implement open APIs by 2020.

The approach exceeded expectations, with over 130 banks implementing or in the process of implementing open APIs by 2020. This success was driven partly by the collaborative culture of Japanese banking, where industry associations like the Japanese Bankers Association (JBA) and the Zengin Net payment network play coordinating roles. The JBA published API guidelines to promote standardization, though individual banks retain flexibility in their specific implementations.

Japan's model differs from the UK or EU approach in that it relies on bilateral agreements between banks and fintech companies rather than mandating a single API standard. Banks negotiate data-sharing terms directly with EPSPs, which must register with the JFSA and meet prescribed operational and security requirements. This bilateral approach gives banks more control over their API programs but can create complexity for fintechs seeking to connect to multiple institutions.

The scope of open APIs in Japan primarily covers account information, balance inquiries, and transaction history. Payment initiation is available through bilateral arrangements but is not universally standardized. Major banks like MUFG, Sumitomo Mitsui, and Mizuho have developed comprehensive API portals and actively engage with the fintech ecosystem.

Japan's broader digital transformation agenda, including the push toward a cashless society and the exploration of a digital yen CBDC, creates additional momentum for open banking adoption. The government's emphasis on data-driven innovation through the Society 5.0 initiative further supports the development of open data ecosystems.