Thanks for the submission. I like overall form. Would prefer a colored logo in a white background. Prefer the style of Entry #7, though the karate technique shown in #8 is a better form. Entry #8 hides the technique too much. I like the kanji characters. A black belt could be a nice accent. Arm positions in Entry #7 are a bit uncontrolled. Something like these arms would be better (one arm out in front a bit bent, one near the body, almost ready to launch upon landing): http://whatthehealthmag.files.wordpress.com/2011/11/karate.gif. That's a flying kick in that picture (don't want that). A roundhouse or thrust kick from the ground would be good.
Entry #46 is really nice. Good form on the karateka. Please pull his right toes in a bit to be striking more with his heel, and put his left heel down a bit so it touches the inner circle. Also, a white circle with red text could work. Many thanks!
I like #75 probably the most out of those. Maybe a richer red. Would really like to figure out some way to get the wheat symbol from the franco manitoban flag in there. And idea might be on the belt somehow. Really not sure on this logo. Also, maybe a more stylized font for the word KARATE.