Mitsubishi

• Mitsubishi UFJ Bank (2006 —)
• Finance: Mitsubishi Corporation , Tokio Marine , Mitsubishi Estate , Meiji Mutual Fund
• Construction: Pacific Consultants International
• Food industry: Kirin Holdings
• Trade: Mitsubishi Shoji
• Automotive industry: Mitsubishi Motors , Mitsubishi Heavy Industries , Mitsubishi Fuso Truck and Bus Corporation
• Petroleum products: Nippon Oil , Mitsubishi Oil , Mitsubishi Nuclear Fuel
• Precision engineering: Nikon
• Chemical industry: Mitsubishi Chemical Holdings , Mitsubishi Gas Chemical , Mitsubishi Rayon Co., Ltd. , Mitsubishi Materials Corp. , Mitsubishi Plastics Industries, Asahi Glass , Nippon Synthetic Chemical Industries (Nippon Gosei)
• Electronics: Mitsubishi Electric , Mitsubishi Precision
• Paper: Mitsubishi Paper Mills Ltd.
• Metallurgy: Mitsubishi Steel
• Shipping: Nippon Yusen

Mitsui

• Sumitomo Mitsui Bank (2001 —), Sony Bank
• Finance: Sony Financial, Mitsui Real Estate, Mitsukoshi, Mitsui Mutual Life, Mitsui Marine & Fire
• Food industry: Nippon Flour Mills , Mitsui Sugar , Suntory
• Chemical industry: Fuji Photo Film , Mitsui Chemicals , Mitsui Petrochemical Industries , Toagosei Chemical Industries , Denki Kagaku Kogyo , Daicel Chemical Industries , Mitsui Pharmaceuticals , Mitsui Toatsu Fertilizers , Mitsui Toatsu Dyes , Toray Industries
• Trade: Mitsui Bussan
• Petroleum Products: General Sekiyu , Kyokuto Petroleum Industries
• Electronics: Sony Corporation , Yaussa Corporation , Ibiden Company , Toshiba
• Metallurgy: Japan Steel Works
• Entertainment: Sony Computer Entertainment , Sony Pictures Entertainment , Sony Music Entertainment

Sumitomo

• Sumitomo Mitsui Bank
• Management companies: Sumitomo Corporation , Sumitomo Corporation of America
• Finance: Sumitomo Mitsui Financial Group , Sumitomo Trust & Banking , Sumitomo Life Insurance Co. , Sumitomo Real Estate , Mitsui Sumitomo Insurance Co., Ltd. , Sumitomo Realty & Development Co., Ltd. , Presidio Ventures
• Construction: Sumitomo Mitsui Construction Co., Ltd. , Sumitomo Densetsu , Sumitomo Osaka Cement Co., Ltd. ,
• Food Industry: Asahi Breweries
• Transport: The Sumitomo Warehouse Co., Ltd. , Hanshin Railway , Keihan Railway , Nankai Railway
• Trade: Sumitomo Corporation
• Automotive Industry: Mazda
• Precision Engineering: Sumitomo Heavy Industries, Ltd. ,
• Electrical and Electronics: NEC , Sumitomo Electric Industries, Ltd. ,
• Metallurgy: Sumitomo Metal Industries, Ltd. , Mezon Stainless Steel Fzco. , Sumitomo Light Metal Industries, Ltd. ,
• Chemical industry: Sumitomo Chemical , Nippon Sheet Glass Co., Ltd. , Sumitomo Bakelite Co., Ltd. , Sumitomo Rubber Industries, Ltd. , Dainippon Sumitomo Pharma ,
• Mining: Sumitomo Metal Mining Co., Ltd.
• Forest industry: Sumitomo Forestry Co., Ltd.
• Infrastructure: Nippon Koei

Fuyo Group

• Mizuho Bank (2000 —), Yasuda Trust and Banking, Yamaichi Securities
• Finance: Yasuda Mutual Life , Yasuda Marine & Fire
• Food industry: Nisshin Flour Milling , Sapporo Breweries
• Transport: Tobu Railway , Keikyu Corporation , Yamaha , Nissan
• Precision engineering: Canon , Hitachi , Ricoh
• Trade: Marubeni , Matsuya
• Chemical industry: Showa Denko , NOF Corporation , Kureha Chemical Industries , Nippon Sanso , Hitachi Chemical , Asahi Kasei

Dai-Ichi Kangyo

• Mizuho Bank (2000 —), Kankaku Securities, Orient Group
• Finance: Fukoku Mutual Life , Asahi Mutual Life , Nissan Marine & Fire , Taisei Marine & Fire
• Electronics: Fujitsu , Hitachi , Fuji Electric , Yaskawa Electric , Nippon Columbia
• Transport: Isuzu , Kawasaki Heavy Industries
• Energy: Tokyo Electric Power
• Petroleum Products: Showa Shell Sekiyu
• Precision Engineering: Asahi Optical
• Trade: Seibu , Itochu ,
• Metallurgy: Kawasaki Steel , Japan Metals Kobe Steel
• Chemical Industry: Denki Kagaku Kogyo-Mitsui Group , Nippon Zeon , Asahi Denka Kogyo , Sankyo Co. , Lion Corporation , Kyowa Hakko Kogyo , Asahi Chemical Industries

Sanwa

• Mitsubishi UFJ Bank (2006 —)
• Food industry: Itoham Foods , Suntory
• Transportation: Hankyu Railway , Keisei Railway , Hitachi Zosen Corporation
• Metallurgy: Kobe Steel , Nakayama Steel Works , Nisshin Steel
• Precision Engineering: Konica Minolta , Hoya Corporation
• Petroleum Products: Cosmo Oil
• Electronics: Hitachi , Iwatsu Electric , Sharp Corporation , Nitto Denko , Kyocera
• Trade: Takashiama , Orix , Nissho Iwai , Takashimaya
• Chemical industry: Ube Industries , Tokuyama Corp , Hitachi Chemical , Sekisui Chemical , Kansai Paint , Tanabe Seiyaku , Astellas Pharma , Daiso Co. , Teijin , Unitika Fukusure
• Cinema: Toho Shin-Maywa

Tokai (Toyota Group)

• Tokai Bank, Chuo Trust
• Food Industry: Kagome
• Transport: Daihatsu , Suzuki Motor , Toyota
• Metallurgy: Daido Steel
• Precision engineering: Ricoh
• Petroleum products: Idemitsu Kosan
• Electronics: Ushio Industries
• Trade: Matsuzakaya

IBJ

• Industrial Bank of Japan, New Japan Securities, Wako Securities, IBJ Securities
• Transport: Fuji Heavy Industries
• Precision Engineering: Ikegai , Riken
• Chemical Industry: Nippon Soda , Chisso Corporation , Nissan Chemical , Tosoh Corporation , Hodogaya Chemical , Plas-Tech , Taihei Chemical , Japan Organo , Kurara