Complex sentence: Kofu is designated as the Special cities of Japan.The city has at least 190,000-199,999 due to the population decline, but after the amagalation of Nakamichi and Kamikuishiki (northern) on March 12,2006, the population went over 200,000.
Split into simpler sentences: Kofu is designated as the Special cities of Japan but due to recent population decline, the city has at least 190,000-199,999. But after the amagalation of Nakamichi and Kamikuishiki (northern) on March 12,2006, the population went over 200,000.