A third series, K2, was serialized in Kodansha's seinen manga magazine Evening from May 2004 until February 2023, when the magazine ceased its publication, and moved to the Comic Days [ja] online platform in March of that same year.

Written and illustrated by Kazuo Mafune [ja], with medical supervision from Tohoru Nakahara,[2] Super Doctor K was serialized in Kodansha's shōnen manga magazine Weekly Shōnen Magazine from April 6, 1988,[3] to October 2, 1996.

[4] Kodansha collected its chapters in 44 tankōbon volumes, released from August 17, 1988,[5] to December 13, 1996.

[8] Its chapters were collected in ten tankōbon volumes, released from April 17, 1997,[9] to November 17, 1998.

[a] Evening ceased publication on February 28, 2023,[14] and the series moved to Kodansha's Comic Days [ja] online platform on March 26 of the same year.