Sumitomo Mitsui Banking Adopts Sakana AI Agent System, Slashing Proposal Preparation Time

Sumitomo Mitsui Banking Corporation prepares proposals for corporate clients by combining financial data with non-financial information such as business strategies. Its partnership with Japanese AI startup Sakana AI assigns analysis and recommendations to multiple AI agents, reducing manual work while improving document quality and consistency.

The bank has formally deployed the automated proposal-generation system in its operations, cutting a process that previously took one to two weeks to tens of minutes. Reports said the process could take anywhere from tens of minutes to several hours, depending on the complexity of the case. As of July 20, 2026, available information did not specify the exact launch date or the amount invested.