At that time, it was identified as the core of the nation's industrial complex. Other than the Miyagi area, nearly all manufacturing industry in the nation lies in this zone, accounting for 81% of the nation's economic output in 2007 (about 4–5 trillion).
In 2007, it was identified as the pivotal area of Japan's industrial landscape. The sector outside of the Miyagi region, which comprises nearly all manufacturing industry, plays a crucial role in generating 81% of the nation's economic output (approximately 4–5 trillion dollars).