The line runs from Kogota Station in Misato to Onagawa Station in Onagawa . It connects the TÅ hoku Main Line to the central coast of Miyagi Prefecture . Part of the East Japan Railway Company ( JR East ) system , it runs from Kogota Station in Misato to Onagawa Station in Onagawa , acting as a spur line from the TÅ hoku Main Line to the central coast of Miyagi Prefecture .