I.O.N was Arina Tanemura's first official series with six chapters. It was published in Ribon from May to November 1997, and collected into a single volume by the publisher, Shueisha in December 1997. The manga was planned to be just three chapters at first. Tanemura's editor increased the number to six eventually. Viz Media published I.O.N in North America in April 2008. The series is also published by Planeta DeAgostini in Spain and Egmont Manga & Anime in Germany.
Tanemura returned to the series in the Ribon Fantasy Zokan Go magazine with a one-shot in 2010. The manga was republished in bunkobon format in 2011, including the one-shot. Volume eight of Sakura Hime: The Legend of Princess Sakura also includes the chapter.
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April 1, 2008