Josh Gross of SI.com has a facisnating interview with Lyoto Machida's father and teacher. 

SI.com: Can you explain the Samurai lifestyle, and how it's applicable to Lyoto's life and fighting career?

Machida: One of the greatest things about the Samurai lifestyle is humbleness and mannerisms and education on how to treat people. Every time Lyoto competes and gets another victory, he should leave the ring or the Octagon being more humble than when he walked in. The minute you stop being humble is the minute you're going to stop moving forward as a fighter and a person. You're going to become stagnant at that point.

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SI.com: Do you see any parallels between Lyoto representing your family's karate and Royce Gracie representing his family's martial arts style?

Machida: There are a lot of similarities, especially the way that Helio Gracie and the Gracie family learned from the Japanese and instilled those same morals. My family is a very tight knit similar to the Gracies. There are similarities the way the families prepared the fighters.

There's a lot more interesting information about the Machida's family dynamic and what Lyoto's father thinks of UFC 98 and mixed martial arts.