Orix Corp (8591.T) and the leasing units of Sumitomo Mitsui Financial Group Inc , Mitsubishi UFJ Financial Group Inc and Sumitomo Mitsui Trust Holdings Inc are among the bidders, the sources said. The Wall Street Journal, which first reported the news, said the finance unit’s assets are valued at about $5 billion. Officials at Orix, Mitsubishi UFJ Financial Group and Sumitomo Mitsui Trust Holdings were not available for comment.