MUFG Bank, Japan's largest financial institution, has addressed the challenge of data overload in its Global Capital Markets Division by leveraging Generative AI (GenAI) to enhance efficiency in the FX & Derivative Sales team. The AI/ML team at MUFG implemented LangChain to streamline data extraction and automate the creation of client presentations, significantly reducing the time required from several hours to just 3-5 minutes. This system, which utilizes retrieval-augmented generation (RAG) and few-shot prompting, enables sales teams, including less experienced members, to generate comprehensive financial insights and recommendations. As a result, MUFG has achieved a tenfold increase in the number of corporate clients receiving tailored financial advice, leading to faster deal execution. The success of this initiative was facilitated by the LangChain programming library, first using Python for research and development and then transitioning to TypeScript for production, enabling dynamic content filtering and retrieval. MUFG plans to further refine its GenAI applications by incorporating broader data sources and exploring advanced AI architectures to continue enhancing sales intelligence and decision-making.