I very much like what you have done with the Z. #3 and #5 are solid concepts. I am looking more for an emblem/patch/picturesque logo. Please keep expanding your entries. I would like to see what more you can come up with.
Conceptually, #28 is great. It lake an intensity in the shading and coloring. I like the black lettering for JIUJITZU but can you make the Z red? Any further detailing you would like to add to the fighters would be appreciated.
The position/interaction of the fighters in entries #45, #46 & #47 is perfect. I am looking for a logo with the edge and intensity of #40. Thanks for the updated entries. I look forward to tomorrow.