Project Overview
A project to automate the most time-consuming task in daily work - "document creation" - using AI for Rakuten Group (approximately 30,000 employees). Developed as a Google Chrome extension, integrated with the internal data analysis platform (DOMO) to create a system that generates data-driven proposal materials with one click.
Technical Challenges
The biggest challenge was converting HTML/DOM structure on a web browser into an editable PowerPoint file (.pptx) without layout collapse.
Solution:
1. Developed a proprietary rendering engine based on PptxGenJS.
2. Ran Gemini Pro on Cloud Run for asynchronous processing of slide structure inference and content generation.
3. Used React Shadow DOM to overlay UI without affecting existing internal tools.
Business Impact
Within 6 months of release, unique users exceeded 10,000. Survey-based estimates confirmed up to 6 hours of time savings per user per month. Achieved a maximum annual productivity impact of approximately ¥3.24B (¥4,500/hour basis) and received internal recognition (2025 Marketing Division MVP).