The true story of Kei, a yakuza who was arrested in Hawaii in the 1980s and sent to the most dangerous prison in the United States. (Source: Mangdex)

Chicano Kei: Beikoku Gokuaku Keimusho wo Ikinuita Nihonjin is the manga adaptation of Kei's autobiography Kei: Chicano ni Natta Nihonjin, published on May 20, 2009.