No, seriously, this article says so.
Incidentally I rcently found out that Discotek Media has done an English-subbed release of all three of Go Nagai’s anime from the 1970s–Cutie Honey, Devilman TV, and Mazinger Z. Tempted to check them out because something about Nagai’s imagination appeals to me. I liked Mazinkaiser (an OVA sorta-sequel to Mazinger) enough to name a computer after it, after all. And can you really hold it against me? No, no you can’t ;).