In previous, Nippon Steel, Japan's largest steelmaker, faced strong opposition to its proposed acquisition of US Steel, which caused strong resistance from union members, even former and current American presidents.

According to the recent document released by both companies, Nippon Steel intended to relocate its US headquarters from Houston to Pittsburgh, where US Steel is headquartered. Nippon Steel has made the commitment that it will not cut jobs, close facilities, or move production overseas.