Sakana AI Signs Comprehensive Partnership with Mitsubishi UFJ Bank

Sakana AI, the Tokyo startup known for its AI Scientist research automation project, has locked in a partnership with Mitsubishi UFJ Bank that runs more than three years. The deal kicks off with a six-month pilot starting July 2025, and the target is narrow but telling: automating the drafting of internal and external documents, one of the most document-heavy corners of retail banking.

This isn't just another chatbot bolted onto email. Sakana says the goal is to go past simple summarization, which existing generative AI already handles well enough, and instead automate the actual judgment calls that go into producing bank-grade documents. That's a much harder problem, and if it works, the plan is to roll it into MUFG's enterprise systems and then push AI agents into other business lines beyond document work.

The timing lines up with Sakana's own pivot. The company spent the past six months talking to Japanese financial institutions before launching a finance-specific AI effort in 2025, and it stood up a dedicated business development division back in March to turn its research, including the AI Scientist-v2 system that got a paper past peer review at a top AI conference workshop, into something banks will actually pay for.

There's a personnel angle too. Sakana co-founder and COO Ren Ito is joining MUFG as an AI advisor, which puts him directly inside the bank's strategy conversations rather than just supplying software from the outside. For a three-year-old startup, having your COO advising Japan's largest banking group on AI implementation is a pretty significant vote of confidence, and it signals MUFG wants Sakana's thinking, not just its tools.

Sakana frames all this as part of a mission to solve Japanese social problems through AI, and banking is an obvious proving ground given how document-driven and risk-averse the industry is. Whether the pilot's document automation actually reduces friction for bankers, rather than just producing faster paperwork, will be the real test before MUFG scales anything further.