Guyver - The Bioboosted Armor (2005)

A devastating earthquake strikes Tokyo, leaving the city in ruins. Man's only hope is to use boomers, an artificial humanoid form. Everything seems perfect until some of the boomers go crazy and start killing people. The only hope of stopping them is the Knight Sabers, a group of 4 female heroes in form-fitting power suits, with which they can perform amazing feats of strength and agility.

Much to the annoyance of Kei, he and his childhood friend Katou have died, having been torn apart by a train. But rather than finding themselves at the gates of heaven, the duo materialize in a room full of strangers and a giant black sphere known as GANTZ. As if dying once wasn’t bad enough, the occupants of the room are then forced to embark on dangerous missions to kill strange aliens; missions that very few return from. Now, Kei, Katou, and a well-endowed friend must fight for their freedom with an arsenal of guns, high powered suits, and a very low chance of survival.

Six years ago, a catastrophic event ravaged Tokyo. Amaha Masune was found at ground zero, physically unscathed, but without memories and with a child in her arms. Returning to Tokyo for the first time since the disaster, the slightly clumsy but cheerful Masune just wants make a new life and to raise her daughter without interference from the Child Welfare Agency. But unsolved murders are being committed all over Tokyo and a near-miss reveals her identity as the bearer of the Witchblade, a mysterious weapon linked to the disaster 6 years before, that seems to have a mind of its own. Giving in to the Witchblade seems dangerous, but when the powerful Dohji Corporation agrees to guarantee her a life together with her daughter if she works for them, can Masune pass up the chance?