Complex sentence: As of June 2011, Fukuoka is Japan's 7th largest city, having passed the population of Kyoto, and the first time a city west of the Kinki region has a larger population since Kyoto was established in the 7th century.
Split into simpler sentences: As of June 2011, Fukuoka is Japan's 7th largest city, having passed the population of Kyoto. This marks the first time that a city west of the Kinki region has a larger population than Kyoto since the founding of Kyoto in the 7th century.