Born in 1973 in the Iidabashi district of Tokyo, comic artist Kou Yaginuma made his debut with the Twin Spica pilot story The Fireworks of 2015 (originally published in the July 2000 issue of Media Factory's Comic Flapper magazine). That heartfelt story coupled with Yaginuma's warm artwork won the young artist won over many comic fans on his way to becoming the year's biggest new artist. He followed his debut with a follow up mini-series called Asumi focusing on the early childhood of Twin Spica's young heroine Asumi Kamokawa. The Asumi series was such a runaway success Media Factory signed Yaginuma up to pen Twin Spica for Comic Flapper in the Fall of 2001. Since Twin Spica's debut, Yaginuma has drawn promotional illustrations for the NHK, Japan's PBS. He has also worked with Japan's brightest young animation director Makoto Shinkai drawing the cover art for the novelization of Shinkai's internationally recognized one-man CG movie Voices of a Distant Star. Twin Spica is Yagunuma's English language debut.