Complex sentence: Kobayashi debuted on September 11 at', introduced by William Regal, where he announced his new ring name, Hideo Itami, meaning "Hero of Pain", and fended off The Ascension when they interrupted the segment to confront Regal.
Split into simpler sentences: Kobayashi debuted on September 11 at', introduced by William Regal. At the event of his debut, he announced his new ring name, Hideo Itami, meaning "Hero of Pain", and fended off The Ascension when they interrupted the segment to confront Regal.