Summary
Sotaro Karasawa is a seasoned technology executive and entrepreneur with 18 years of experience building and scaling consumer and platform products from startup to exit. He has held CTO and VP of Engineering roles at Mercari and Star Festival, led a successful startup exit into Yahoo! JAPAN as Crocos co-founder/CTO, and now serves as an outside director while running his own companies. Hands-on across PHP, Python, C++, JavaScript and DevOps, he blends product-minded engineering with operations research and log-driven decision making to optimize growth and reliability. Known for turning small, agile teams into high-performing engineering organizations, he also has deep experience in web infrastructure and deployment tooling. Based in Tokyo with a master’s in information science from Chuo University, he pairs academic rigor with a track record of practical execution and business growth. An uncommon strength is his history of shifting between founder/operator and director roles, giving him both entrepreneurial grit and governance perspective.
17 years of coding experience
14 years of employment as a software developer
Master's Degree, Information Science, Master's Degree, Information Science at Chuo University