The name Cobaltore comes from the combination of two Spanish words: cobalto, referring to cobalt blue, and floresta, meaning "forest".

It was founded by the local community, formed by people who wanted to stay in the city instead of leaving for Sendai or Tokyo.

[2] Despite the strong shock and skipping the 2011 season due to damages and the impossibility of using their own stadium, which was used as a shelter, Cobaltore players - especially the Japanese - remained in town to give a hand to the city that hosted their careers.

The group of Onagawa Supporters pushed back the club into the pitch and - for 2012 season - Cobaltore returned on the field.

[3] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.