Ken Akamatsu (赤松 健, Akamatsu Ken, born July 5, 1968) is a renowned Japanese manga artist and politician. He has been serving as a member of the House of Councillors since 2022. Ken Akamatsu made his professional manga debut in 1993 and is widely known for his works Love Hina (1998–2001) and Negima! Magister Negi Magi (2003–2012), both of which were serialized in Weekly Shōnen Magazine.

A sequel to Negima!, titled UQ Holder!, was serialized from 2013 to 2022. In 2011, Akamatsu founded J-Comi (now Manga Library Z), a free digital distributor of out-of-print manga. He has been a managing director of the Japan Cartoonists Association since 2018 and is a vocal advocate for protecting freedom of expression in manga and anime against expansions in censorship and copyright law.

In the 2022 Japanese House of Councillors election, Akamatsu won a seat as a candidate for the Liberal Democratic Party in the national proportional representation block on a free expression platform, making history as the first manga creator to enter the National Diet.

Ken Akamatsu initially failed the entrance exam for the prestigious University of Tokyo and instead studied literature at Chūō University. Like many Japanese artists, he began creating dōjinshi for Comiket under the pseudonym Awa Mizuno (水野亜和, Mizuno Awa) before moving into commercial manga.