User blog comment:B214/Shin DxD 1 discussion/@comment-36663391-20181013090942/@comment-32573280-20181014184948

Ishibumi has said that the Mitsuya Kanzaki in Denpachi and the one in DxD can be consider to be alternative versions of each other. Denpachi itself is unrelated to DxD similar to how the original Slashdog light novel was unrelated to DxD until it got rebooted as a webnovel with a re-release as a light novel series.