Atsushi Ōkubo was not a model student and was more attracted to drawing than to learning. At the age of 20, after finishing studies at a manga school where he met Rando Ayamine, the artist of "Get Backers", he became Rando Ayamine's assistant for two years. Finally, he won a competition at Square Enix's Gangan magazine with his first manga series B.Ichi and it was published for four volumes. After the end of his last manga, he created Soul Eater, still for Square Enix's Gangan magazine, which brought him worldwide success.