Complex sentence: Izumi began judo at a young age and is known as a very accomplished judoka, winning the Men's -90kg category silver medal at the Athens Olympics in 2004 and the gold medal at the World judo championship games in Cairo, Egypt on 2005.
Split into simpler sentences: Izumi began judo at a young age and is known as a very accomplished judoka. He won the Men's -90kg category silver medal at the Athens Olympics in 2004 and the gold medal at the World judo championship games in Cairo, Egypt on 2005.