Complex sentence: After an early career in the arts, he served for 25 years in the Parliament, leaving after the Tokyo subway attack in 1995, and then served as Governor of Tokyo from April 1999 to October 2012.
Split into simpler sentences: After an early career in the arts, he served for 25 years in the Parliament, leaving after the Tokyo subway attack in 1995. He subsequently served as Governor of Tokyo from April 1999 to October 2012.