Fist Of The Seeker
When martial artist Ikeuchi Mentaro is defeated in a tournament hosted by the Rokushin Kaikan karate school, he gives up karate to seek the strength he could not achieve through it. Soon enough, Rokushin Kaikan calls for another open tournament, and invites Ikeuchi and several other martial artists from different schools to compete. Ikeuchi sees this as the chance to get his revenge, and see how far he's come.
This webcomic was written and drawn by Sandrovich Yabako in his amateur days, before he wrote Kengan Asura and Danberu Nan Kiro Moteru? A number of characters from this series, such as Kureishi Mitsuyo, would go on to appear in his later works.