Koichiro Doi was born and raised in Japan. He studied at Parsons School of Design in New York City before starting his career as a still life photographer. He is currently based in Tokyo.
His advertising clients include Guerlin, Armani, Biotherm, Canon, Carolina Herrera Parfums, Cartier, Covergirl, Clarins, Dior Beauty, Häagen-Dazs, Hennessy, Issey Miyake, Kerastase, Kenzo, Lancôme, L’Oréal, Nexxus Beauty USA, Nissan, Omega, Pantene, Revlon Cosmetics, Rolex, Sephora, Shu Uemura, Shiseido, SKII, and Tom Ford.
His editorial clients include French Magazine, Numéro, Velvet, Vogue Japan, i-D, and V Magazine.