Trading house to invest in field key to keeping airlines in operation Itochu's investment in IAG Engine Tech, which originated under Spanish airline Iberia, is aimed at creating links between the trading house's leasing and maintenance activities. (Photo obtained by Nikkei) TOKYO -- Japanese trading house Itochu will invest in a unit of International Airlines Group (IAG), the parent company of British Airways, Spain's Iberia and other carriers, gaining a foothold in aircraft engine maintenance.