It was serialized in Shogakukan's seinen manga magazine Monthly Sunday Gene-X from April 2006 to January 2012, with its chapters collected in eleven tankōbon volumes.

The series follows Koko Hekmatyar, a young arms dealer who sells weapons under HCLI, an international shipping corporation and illegal smuggling operation.

The newest addition to her crew is Jonah, an inexpressive and deadly child soldier who hates arms dealers.

Written and illustrated by Keitaro Takahashi, Jormungand was serialized in Shogakukan's seinen manga magazine Monthly Sunday Gene-X from April 19, 2006,[b] to January 19, 2012.

[33][34] The first release of Jormungand on DVD and Blu-ray was on June 27, 2012 with the first two episodes, "Gun Metal, Calico Road" and "Pulsar" included.

A radio show hosted by voice actors Shizuka Itō and Mutsumi Tamura was broadcast in 2012 to promote the series.

[50] Scott Green, writing for Ain't It Cool News, summed up the series as being enjoyable, but underachieving.

[53] Karen Maeda enjoyed the action shown in the sixth volume, regarding the panels as being easy to follow, and hoped that Jormungand would be produced as an anime.

[54] Anime News Network's review of Jormungand points out the "challenging ideas about war, peace, and world affairs—and throws in some whiz-bang military action for good measure.