A young boy named Toshio and his friends, while exploring an abandoned factory, are taken captive by gangsters. Toshi unwittingly discovers a signal device that will summon the cyborg superhero Electric Man ...

Two gods come asking a girl to donate some money for a charitable cause. Too bad, she's completely broke.

zombies are everywhere, and banging everything they can get their hands on

Seems this was first published in 1985; then, re-printed in 1997.