I like the overall figure and the rays inside. I'm leaning more towards a red or white circle. His right hand seems a bit uncontrolled, maybe bring into the front of the body a bit (in front of solar plexus / abdomen).
I like elements of #79 (black border on red circle), #39 (text with karate on top, st b on the bottom) and #29 (full karate person visible).
Overall, doing a nice ura-mawashi kick with the instep of the foot. However, he's split a bit too much. Please try his right foot flat on the ground and then have his legs not so split. Also, his left arm please make up at an angle parallel to the leg, and bent from straight out a bit (135 degrees). Kanji characters vertical. Not sure how to put in the flag element.
Like logo #92. Arm is great as are the legs. Left foot is pulled back a bit too much. I like the incorporation of the flag. Not sure why, but I'm hesitant about a black circle still. As I mentioned, I really like the red circle, white text and thin black border of #79 or a white circle with red text. Stylizing the word karate would be of interest as well.