IR Japan Holdings, Ltd. provides investor and shareholder relation consulting services to publicly listed companies in Japan. It offers equity consulting services, shareholder identification surveys, voting right simulations, proxy advisory services, and professional advisory services related to investment banking operations. The company also provides merger and acquisition (M&A) services, such as ownership battles, corporate restructuring, and business reorganizations; collection, analysis, and provision of investment information services; proxy advisory services; and financial advisory services related to activist response, hostile TOB response, advanced MBO, and M&A. In addition, it engages in the research and provision of information on domestic and overseas capital market trends. The company was founded in 1984 and is headquartered in Tokyo, Japan.