The Yokohama Grits were founded on 2 May 2019 by Grits Sports Innovators Corporation, an organisation led by Akihito Usui.[2] The Grits are the first ice hockey team based in the Greater Tokyo Area since the Seibu Prince Rabbits folded in 2009.[1] On 2 June 2020 the team was announced as the eighth member of Asia League Ice Hockey,[3] with former NHL player Mike Kennedy serving as the head coach.[1] Due to the COVID-19 pandemic in Asia, the league cancelled its planned 2020–21 season, and a three-country Asia League tournament was scheduled instead.[4] In October of the same year, the Grits took part in the Asia League Japan Cup.[5]