Itoh was headquartered near the site of Chubei Itoh's historical headquarters in Osaka until 1967, when it upgraded its Tokyo branch to the status of a co-headquarters. In the 1970s, the company became part of the "Kawasaki Group" within the keiretsu of Dai-Ichi Kangyo Bank (now Mizuho Corporate Bank), eventually displacing Nissho Iwai as the keiretsu's dominant trading company. Itoh's affiliation with the keiretsu was significantly looser than other keiretsu-affiliated trading companies, and many firms within the DKB group did not use Itoh's services at all.