Baki the Grappler (2001)

Blurb:
Every warrior’s life is but a moment. These fearless fighters exist knowing all too well that each moment could be their last. There is always someone stronger, or faster. There is always someone unafraid to go to any length to ensure victory, or survival. And at least once in each warrior’s life, that warrior wonders what it would be like to be the worlds best. It is this great unknown, this passion for power that drives the Grappler. Each must choose to throw all else aside to achieve their goal, or forever shrink into the shadows, their potential unfulfilled.

Feeling his training to be the strongest fighter in the world is going nowhere, Baki Hanma quits his program believing that the only coach he needs is himself. Baki stumbles on his first step into this new world. Will he learn from his errors and achieve his potential? Or will he forever disappear among the millions of fighters who never realized that one must crawl before one may walk?

Source: www.anisearch.com/anime/3483