Now this one is tough, i have talked to so many people and i have tried to search so much.
I saw a film when i was a kid, it was this strangest thing. In my country the film was actually called "man of steel" / "Stålmannen" :In Norwegian (Though i do not know what title this film had in English, but in my language the film title translates directly to man of steel). The film is Asian i think, and it is about a man that can fly, and he fights huge creatures, like godzillas or something like that. Or huge robots like we see in Neon genesis. I think i can recall this man of steel wearing a full metal suit with helmet.
I can not seem to have found a godzilla movie that has a flying man beating him up. But that does not mean it isn't a godzilla movie or spin-off. This might also be a movie made around 1976-1980 to be a sort of Japanese take on Superman the movie or King Kong.
I remember far to little of the film, because i was very young when i saw it, and that was in the mid-late 80's. So it must of course have been made before this. The effects were not very good, and i bet this film/tv movie released on VHS was made between 1970 and 1988. I could rent this in the video store.
Hehe, i hope some other member here actually have seen this piece of art and can help me out.
Edit: This movie i'm looking for is not animated.
Edit 2: After getting a lot of help from you guys we might be on our way to narrow it down. Mirrorman seem to be the one that comes closest at the moment. But i can not seem to find a full size movie of this character. And he also is to big, i am almost certain the hero i am talking about was not monster size, or it can maybe be my brain tricking me since he is a normal man, then becomes big size as mirrorman. This i cannot say for sure, but mirrormans battles and suit do give me some flashbacks. And it does not seem to be ultraman.
Edit 3: Anyone know if Hong Kong ever made something like this? We have been focusing on Japan all the way.