The Sakaume-gumi is an old-established, small group that focuses primarily on gambling, and not on other activities like extortion and drugs. Perhaps because of this, it has had relatively good relations with the local police.
When Japan passed new anti-boryokudan laws in 1992, the Sakaume-gumi was one of the few Kansai-based groups not to launch legal challenges against the new legislation. At a hearing, the group's representative stated, "If the Sakaume-gumi fulfills conditions for designation (as a boryokudan group), we have no choice but to accept it."
One former member of the Sakaume-gumi has achieved a measure of fame in another field: born-again Christianity. Rev Hiroyuki Suzuki, a tattooed, pinky-missing former Sakaume-gumi gangster, has become an evangelical Christian preacher.
- 1st: Umekichi Tobi
- 2nd: Yukichi Tanaka
- 3rd: Shojiro Matsuyama
- 4th: Yukio Nakano
- 5th (1979–1995): Masao Taniguchi
- 6th (1996–1999): Koji Oyama
- 7th (1999-present): Kozaburo Kaneyama
- 8th (2015-present): Mufiyan Hadi
- "Police of Japan 2011, Criminal Investigation : 2. Fight Against Organized Crime", December 2009, National Police Agency
- "2010 Police White Paper Chapter 2 : Furtherance of Organized Crime Countermeasures", 2010, National Police Agency (Japanese)
- "List of designated boryokudan groups under the Organized Crime Countermeasures Law", 2 August 2011, The Kochi Prefectural Center for the Elimination of Violence (Japanese)
- "He Watched Over His Rackets; Now It's His Flock", 22 June 1999, The New York Times