Medical Doctor and graduate of the University of Tokyo School of Medicine with biomedical data science expertise from Stanford. Published 34 books, including the bestselling 'Ghost Mental Arithmetic' series, and also directed puzzle creation for the Nintendo Switch/3DS 'Professor Layton' series and other Nintendo titles.

Software engineer with experience at Google and Niantic, focusing on infrastructure, backend development, and AI-powered systems. Founded his own company building ad-tech and educational software solutions. Holds a double major in physics and computer science from the University of Pennsylvania.