I actually looked up what a shingami was. It is not something I want to mess with. Wikipedia's initial description. Here's the full article. http://en.wikipedia.org/wiki/Shinigami
In Japanese culture, shinigami (?, "god of death") is a god or supernatural spirit that invites humans towards death, or induces suicidal desires in humans.  The shinigami is a personification of death, but whether its personhood is literal or merely poetic anthropomorphism varies in Japanese religion, literature, and folk tradition. In modern Japanese fiction, the shinigami is most often literal, and synonymous with the Grim Reaper.