Ikegami began drawing his first comic series at the age of seventeen. Even then, Ikegami had the magic touch, and his first two collaborative efforts - I UEO Boy with Koike Kazuo in 1973 and Otoko Gumi in 1974 with Kariya Tetsu - proved so popular they set the pattern for what would turn out to be one of the manga world's biggest success stories. Although many of his earlier works were written and drawn solo, nowadays Ikegami works almost exclusively with collaborators and shows no signs of stopping.

He worked at Mizuki Production as an assistant for about a year and a half. He is a fan of TSUGE Yoshiharu’s works, Ikegami was surprised when he saw Tsuge also worked at MIZUKI Shigeru’s place.

Ikegami once applied to be an assistant to SATO Masaaki & SAITO Takao but they already had enough assistants at that time.

FUJIWARA Yoshihide, MATSUHISA Yuu, SATA Misaki and Akiha @ were once his assistants.

Friends with MOTOMIYA Hiroshi, NAGAI Go and YAMAGAMI Tatsuhiko.

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