I have seen a few concepts for a male version of a sailor senshi floating around DA before. One thing I noticed but what did not make sense to me was some of them just wore regular sailor outfits that they have in the Marines. I mean isn't Sailor Moon a Japanese type super hero? Why would the senshi costume just be regular cloths? So I thought of what American style male super heroes wore and I adjusted the SM costume to fit that. I took off the bows of course and replaced the skirt with pants to masculine the costume up. I added a belt to round the whole thing off. I made him have a molded chest plate that makes it look like he has pecs. Much like how Roman soldiers have the molded chest plates. So no that is not his real chest. As you can see from his arms he has a average build. I think it came out pretty well. Its a bit flamboyant but not too much more then what Superman wears.
*note* I am very aware sailor senshi can only be female. This is a idea of what Sailor Moon would look like if in a alternate universe all the senshi were male.
This is probably one of the best male scout designs I've seen so far. I hope you do the other senshi because I'm really curious about how you'd interparate them in this style.