The Nagato Combine is a Yakuza run keiretsu, or corporate conglomerate.
In the Nagato Combine the members have interlocking ownership, buying large shares in each other for mutual interest and protection. Mitsubishi , Sony, and Chrysler-Nissan are also examples of keiretsu.
The Nagato Combine has offices in New Jersey, and has existed since at least the late 2030s, and as of 2064 continues to break ranks with traditional Japanese values -- namely employing a mostly Elven brigade known as the Green Serpent Guard as some sort of exchange program with Telestrian Industries. Among the Yakuza clans which are part of the Nagato Combine are the Honjowara-gumi and the Toki-gumi.