Miyagi (mēyäˈgē) [key], prefecture (1990 pop. 2,248,521), 2,808 sq mi (7,273 sq km), N Honshu, Japan. A mountainous prefecture, it is known for the more than 200 pine-covered islands in Matsushima Bay. Sendai is the capital. The prefecture yields farm products, fish, lumber, raw silk, electrical machinery and transport equipment. Ishinomaki and Shiogama are important ports. Coastal areas of Miyagi were devastated by the tsunami that followed the 2011 earthquake; in some areas the waters reached 5 mi (8 km) inland.