 With an estimated membership of 5,000, it is the second-largest Yamaguchi affiliate after the Yamaken-gumi, and operates in at least 18 prefectures.The Kodo-kai is under close surveillance by the National Police Agency, as the NPA considers the organization to not be a traditional yakuza organization, but to be more like a mafia-type organization or terrorist organization.The Kodo-kai is notorious for its defiant attitude toward the official, and has dispensed with the yakuza's traditional policy of co-operating with the police.