Koichiro Doi was born and raised in Tokyo. He moved to New York originally to study fashion design, and graduated from Parsons School of Design. After returning to Japan, DOI began shifting his focus to photography, and started his career as a Still Life photographer, acquiring skills and technique through self-study. DOI now specializes in Beauty as well as Still Life.

DOI shoots for various fashion magazines such as Big, French Magazine, Numéro, Velvet, Vogue Nippon, Wallpaper, i-D, Harper’s Bazaar Japan, V Magazine and Spur. Among his Advertising clients: Biotherm, Kerastase, Shu Uemura Art of Hair, Shiseido, Omega, Lancôme, L’Oréal professional, L’Oréal, Wella, Anteprima, Issey Miyake, Paul & Joe Beauté, Anna Sui Cosmetics, Häagen-Dazs, Canon, Dior Beauty, Kenzo, Clarins, Carolina Herrera Parfums, Falke, Nexxus Beauty USA and Nissan.