Complex sentence: Taika Seiyu Oyata, the founder of Ryū-te, began his martial arts training at a very early age, as he was exposed to the Okinawan form of sumo through his father, Kana Oyata.
Split into simpler sentences: Taika Seiyu Oyata, the founder of Ryū-te, began his martial arts training at a very early age. He was exposed to the Okinawan form of sumo through his father, Kana Oyata.