Complex sentence: He was heavily injured in the 9th Race in Germany in 2015 season caused indirectly by the collision between him and Hayato, although his life is spared, but he was unable to participate in Cyber Formula again and has to withdrawn from the series.
Split into simpler sentences: He was heavily injured in the 9th Race in Germany in 2015 season caused indirectly by the collision between him and Hayato. Although his life is spared, he was unable to participate in Cyber Formula again and has to withdrawn from the series.