北城睦実 623 サブロー先輩 サブロー 326
[[Keroro Gunsou]] character; called Saburo Mutsumi in the anime adaption. 

He has [[short hair|short]] [[grey hair]] and [[blue eyes]]. He is usually depicted in the [[Kissho Academy school uniform]], and often wears a [[yellow hat|yellow]] [[beanie]].

h4. Official art
* !asset #23404573

h4. Trivia
* "Mutsumi" can be read as "623". He uses this string of numbers as his moniker for the radio show he hosts and DJs.
* In the manga, this alias is "326".
* He is often seen with [[Kururu (keroro gunsou)|]], the only character to know his secret DJ identity.
* He is voiced by [[Ishida Akira]].


h4. See also
* [[List of Keroro Gunsou characters]]
houjou mutsumi