Sei studied architecture at Nagoya Institute of Technology. After a year of living in seaside towns in Japan and overseas, such as Toyohashi and Bali of Indonesia, and becoming passionate about traveling and surfing, he studied in architecture(ME) from Nagoya Institute of Technology. After graduating, he worked at architectural firm, and was responsible for a variety of projects both in Japan and abroad. He specializes in architecture, graphics, and other general design.