나가시마 시게오
Born in Cupa, Mr. takes his pseudonym from that of former Yomiuri Giants baseball player Shigeo Nagashima, who was frequently referred to as "Mr. Giants". Mr. graduated from Sokei Art School in 1996, having been discovered by Murakami the year prior. He has since worked as an assistant to Murakami, and member of Murakami's Kaikai Kiki studio, which has also supported Mr. in his solo career. His participation in Murakami's 2000 exhibition "Super Flat" played a crucial role in earning him international attention and recognition.