Mikio Itoo

Mikio Itoo is a background joke character created by Eiichiro Oda, and arguably the first Easter Egg featured in One Piece.

He is a fictionalization of Mikio Ito (いとうみきお), a Yokohama-born manga creator who began - alongside Oda - as an assistant to Nobuhiro Watsuki. Like Oda, Ito came to contribute his own series to Weekly Shonen Jump, such as Normandy Secret Club and Mysterious Musume-kun.

Within the world of One Piece, Itoo appears to be a wanted gunman with a bounty of one million yen. How many Belly this would amount to is unknown.

Appearance
Thus far, Itoo has "appeared" mostly on wanted posters scattered throughout areas of the East Blue. These tend to vary greatly in detail; the most detailed depicts him as a man with an untidy mop of brown hair and matching beard.

His name has independently appeared on a number of other items throughout the East Blue, most notably alcohol bottles.

Anime and Manga Differences
Due to its tendency to gloss over small background details from the manga (especially in its early episodes), the anime has kept few, if any, of Itoo's appearances.

Trivia

 * Itoo has appeared as a joke character in at least two other series:
 * Rurouni Kenshin, by his mentor Nobuhiro Watsuki
 * Butsu Zone, by his fellow assistant Hiroyuki Takei

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