| Member Firms of Six Horizontal Keiretsu | Reference: | Jpns Corporate Keiretu (in Jpns) | (1998) | Touyou-keizai Shinposya | ||
| 1. See also Six Horizontal Keiretsu; The Heart of the Horizontal Keiretsu (Bankers and Traders). | ||||||
| 2. Six horizontal Keiretsu | Financial Institutions | General Trading | Electrical Appliances | Automobiles | Precisions | Real Estate |
| The Mitui Keiretu | Sakura Bank Group, Mitui Trust Bank, Mitui Life Insurance | Mitui Bussan Group | Toshiba Group | Toyota | Mitui Fudosan Group | |
| The Mitubishi Keiretu | Tokyo-Mitubishi Bank Group, Mitubishi Trust Bank, Meiji Life Insurance, Tokyo Marine and Fire Insurance | Mitubishi Shyoji Group | Mitubishi Electric Group | Mitubishi Motors | Mitubishi Jishyo Group | |
| The Sumitomo Keiretu | Sumitomo Bank Group, Sumitomo Trust Bank, Sumitomo Life Insurance, Sumitomo Marine and Fire Insurance | Sumitomo Shyoji Group | NEC Group | Sumitomo Fudosan Group | ||
| The Huyou Keiretu | Fuji Bank Group, Yasuda Trust Bank, Yasuda Life Insurance, Yasuda Marine and Fire Insurance | Marubeni Group | Oki Electric Group, Hitachi | Nissan Group | Canon Group | Tokyo Building (東京建物) |
| The Sanwa Keiretu | Sanwa Bank Group, Touyou Trust Bank, Nippon Life Insurance | Nichimen, Nisshyo Iwai, Iwatani Sangyo | Sharp Group, Kyocella Group, Hitachi | Daihatu | HOYA | |
| The Ikkan Keiretu | DKB (Dai'Ichi Kangyo Bank) Group, Asahi Life Insurance, Fukoku Life Insurance, Nissan Marine and Fire Insurance | Itoh Chyu Shyoji Group | Fujitu Group, Yasukawa Electric, Hitachi | Isuzu Group | Asahi Kougaku | |