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The Kodo-kai (弘道会 Kōdō-kai, Koh-doh-kai) is a yakuza criminal organization based in Nagoya, Japan.[1] It is a secondary organization of the Sixth Yamaguchi-gumi, the largest known yakuza syndicate in Japan.[2] With an estimated membership of 5,000,[3] it is the second-largest Yamaguchi affiliate after the Yamaken-gumi, and operates in at least 18 prefectures.[4]

The daimon of the Kodo-kai

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;[5] 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.[3]

The Kodo-kai has been one of the wealthiest clans in the Yamaguchi-gumi, with an immense working capital estimated at around $5 billion.[5]


The Kodo-kai was founded in 1984 by Shinobu Tsukasa[6] with 24 other members including Kiyoshi Takayama.[5] At this time, Tsukasa became a formal member of the Fourth Yamaguchi-gumi; when the Fifth Yamaguchi-gumi started in May 1989, Tsukasa assumed the position of wakagashira-hosa (one of the third-ranking bosses).

The Kodo-kai's territories include Sakae, the largest downtown in the Nagoya area.[7]

Kiyoshi Takayama was promoted to the number-two boss (wakagashira) in 1989, and to the 2nd president (kaicho) in March 2005;[6] the Kodo-kai expanded under Takayama's administration,[6] and by late 2009 its total membership reached 4,000.[5]

Takayama became a formal member of the Fifth Yamaguchi-gumi in April, 2005, and assumed the position of wakagashira-hosa in June, 2005, and when Tsukasa became the kumicho (Godfather) of the Sixth Yamaguchi-gumi in July 2005, his Kodo-kai partner Takayama was given the position of the wakagashira (number-two boss) on August 8.[8]


1st (1984–2005)[edit]

Shinobu Tsukasa, also one of the third-ranking bosses (wakagashira-hosa) of the Fifth Yamaguchi-gumi and the founding head of the Tsukasa-kogyo, he would later become the head of the Hirota-gumi and the supreme boss of the Sixth Yamaguchi-gumi.

2nd (2005–)[edit]

Kiyoshi Takayama who is the number-two boss (wakagashira) of the Sixth Yamaguchi-gumi and the founding head of the Takayama-gumi, and former chief director (rijicho) of the Ryoshin-kai.


Described as a "financial mafia" by a former officer of the Aichi Prefectural Police Department, the Kodo-kai's activities include banking or investment banking for the criminal underworld;[5] the Kodo-kai is allegedly also very active and powerful in traditional "yakuza-friendly" businesses, such as the real estate business, securities business and show business.[9]

A senior member of another Yamaguchi-affiliate has revealed that the Kodo-kai manages a private intelligence organization which specializes in espionage including police-targeted intelligence.[10]

According to Japanese media sources, the organization is among the most profitable of all the Yakuza factions in Japan. Kodo-kai reportedly raked in an immense amount of money by being the sole supplier of rock, sand, and gravel for the Chūbu Centrair International Airport construction project; the organization continues to earn large revenue by controlling the stevedoring and warehousing companies at the Port of Nagoya, and having a monopoly on sex-oriented establishments in the Nagoya area.[11]


The Kodo-kai's known branch organizations have included :

among others.


  1. ^ "Nation's No. 2 gangster arrested", November 19, 2010, Daily Yomiuri
  2. ^ "Police anti-gang drive in trouble", December 11, 2010, Asahi Shimbun
  3. ^ a b "Yakuza chief arrested in Japan", November 18, 2010, The Guardian
  4. ^ "Police wary as Yamaguchi-gumi prepares to fete sixth don", August 19, 2005, The Japan Times
  5. ^ a b c d e "The "Top Operations" for destroying the Yamaguchi-gumi Kodo-kai, arresting from the kumicho to the number 3" Archived 2011-10-02 at the Wayback Machine, December 17, 2010, Weekly Friday (in Japanese)
  6. ^ a b c "2010 Police White Paper Chapter 2 : Furtherance of Organized Crime Countermeasures, Columun 1 : Kodo-kai Countermeasures", 2010, National Police Agency (in Japanese)
  7. ^ "Police internal document with a strategy for destroying the 'Kodo-kai'", July 7, 2010, Gendai Business (in Japanese)
  8. ^ "From rackets to real estate, yakuza multifaceted", February 14, 2007, The Japan Times
  9. ^ "Police's 'Yamaguchi-gumi Cleanup Operation' behind the O-zumo's 'Baseball Gambling'", July 1, 2010, Gendai Business (in Japanese)
  10. ^ "Muddy Stream of Doubt : One year until the Yamaguchi-gumi kumicho's prison release, Will there be any 'industry reorganization'? Boryokudan maneuver to assemble information" 2/5 Archived 2011-11-06 at the Wayback Machine, May 2, 2010, Sankei Shimbun (in Japanese)
  11. ^ Sentaku Magazine (reprinted in the Japan Times), "Kodo-kai still raking in funds despite tougher yakuza laws", 23 October 2015
  12. ^ "The Kodo-kai Kyushu top is arrested, relating to the construction works for the Nagasaki University Hospital" Archived 2011-06-30 at the Wayback Machine, June 25, 2011, Yomiuri Shimbun (in Japanese)
  13. ^ "Yamaguchi-gumi Kodo-kai affiliate kumicho is arrested, on suspicion of extorting", January 29, 2011, 47 News (in Japanese)
  14. ^ "Kodo-kai affiliate kumicho is arrested, on suspicion of a car loan fraud", January 21, 2011, Chiba Nippo (in Japanese)
  15. ^ "Nine are arrested for unregistered loaning, the system finance belonging to the Kodo-kai", January 18, 2011, 47 News (in Japanese)
  16. ^ "Kodo-kai wakagashira-hosa is arrested on suspicion of fraud — Aomori, Nagano Police", December 4, 2010, Asahi Shimbun (in Japanese)
  17. ^ "The background of the arrest of the wakagashira Kiyoshi Takayama, is a fierce conflict for the 'Kyoto concession'!", November 25, 2010, Gendai Business (in Japanese)