Complex sentence: The story is told primarily in first-person narrative by Otori Takeo (first introduced to the readers as Tomasu), who was born in a small village (Mino) of religious outcasts referred to as the "Hidden".
Split into simpler sentences: The story is told primarily in first-person narrative by Otori Takeo. He was born as Tomasu in Mino, a small village of religious outcasts referred to as the "Hidden".