KuroganeKurogane.

Kurogane (Japanese: 黒鉄), also known as Black Steel, is a Japanese manga series written and illustrated by Kei Toume. It was first serialized in Kodansha's Morning Open Zōkan in February 1996, ran in the magazine until June 1997, it was transferred to the publisher's seinen manga magazine Morning; in August 2003, the manga went on a long hiatus. its chapters were collected in five tankōbon volumes by Kodansha; in February 2017, the manga resumed serialization under the title Kurogane Kai in Shueisha's Grand Jump magazine, which completed in October 2020 with its chapters collected in five volumes by Shueisha.