From acquisition to AI: how Japan’s banks are reinventing themselves in 2025

Japan’s financial sector is undergoing a profound transformation, propelled by regulatory liberalization, digital transformation by incumbent banks, and healthy competition from a burgeoning FinTech scene. This shift is clearly evidenced by the Bank of Japan’s April 2025 survey, which revealed that Japan’s three major megabanks – SMBC Group, MUFG Bank, and Mizuho Bank – are collectively planning to invest over JPY 1 trillion in digital platforms starting in fiscal year 2025-2026.

Among the incumbents, SMBC Group has emerged as a clear leader in digital transformation. For the second consecutive year, SMBC was recognized as a Digital Transformation Brand by Japan’s Ministry of Economy, Trade and Industry (METI) and the Tokyo Stock Exchange. This prestigious award underscores SMBC’s “Beyond & Connect” and “Empower Innovation” strategies, which encourage internal experimentation, cross-industry partnerships, and AI-driven solutions.

SMBC’s commitment to digital extends deep into its operations. The bank has been a pioneer in AI adoption, including early implementation of IBM Watson in its call centers as far back as 2014. More recently, it has deployed internal GenAI tools like SMBC‑GAI across the entire organization. At the GFTN Forum Japan this year, SMBC’s Chief Digital Innovation Officer highlighted how AI is being used daily by staff to optimize workflows and boost productivity.

Not to be outdone, MUFG will deploy JPY 900 billion to upgrade systems and launch a standalone digital bank by FY 2026. The urgency reflects a broader strategy to retain customers amid rapidly growing competition. A key part of MUFG’s strategy involves a collaboration with Google, leveraging its cloud infrastructure to attract and retain digitally savvy consumers, such as college students. The goal is to cultivate long-term banking relationships with these individuals as they transition into the workforce.

Meanwhile, Mizuho Bank is making a significant move into the high-growth FinTech segment with its recent agreement to acquire a majority stake in Upsider. Upsider, a Japan based financial services provider, focuses on serving startups and SMBs, offering innovative solutions like AI-based credit modeling. This acquisition signals Mizuho’s ambition to extend beyond traditional banking services and capture new market share in the dynamic FinTech landscape.

Beyond the traditional megabanks, the Japanese banking scene could soon see the emergence of a formidable fourth player. Regional banks are charting ambitious new directions, with SBI Shinsei at the forefront. As it prepares to repay public funds and relist in Tokyo by year-end, SBI Shinsei aims to position itself as Japan’s fourth megabank under the umbrella of its digitally native, FinTech-driven parent, SBI Holdings. This move could significantly alter the competitive dynamics of the Japanese banking sector.

These transformative developments collectively paint a clear picture of Japan’s evolving financial ecosystem. The substantial digitization spending by MUFG, SMBC, and Mizuho underscores a renewed, deep-seated focus on innovation. Simultaneously, non-Japanese companies are increasingly integrating into Japan’s payment and settlement infrastructure, while also fostering greater cross-border FinTech collaboration.

While formal revisions to the Banking Act may not have surfaced recently, the industry is moving towards a more flexible and innovation-friendly environment. Banks are actively building digital ecosystems, FinTech challengers are gaining momentum, and policy is adapting to support this dynamic shift. For consumers, they stand to benefit from faster, smarter, and more tailored financial services as Japan’s economy accelerates into its next chapter.