Complex sentence: Mitose lived in Hawai'i (pre-statehood) until around the age of four, he went back to Japan (thought to be on October 22,1920) to study the family art of Kosho-Shorei Kenpō.
Split into simpler sentences: Mitose lived in Hawai'i (pre-statehood) until around the age of four. He went back to Japan (thought to be on October 22,1920) to study the family art of Kosho-Shorei Kenpō.