Tokyo Stock Exchange Inc. / USEN Corp. / Change Company 3141 Welcia Holdings Co. Ltd. / Nikkei Inc. / Japan Exchange Inc. / Private Placement 20150407 20150430 W ELCIA HOLDINGS CO.LTD. / Note 20150323 20150402 Electric Power Development Co.Ltd. / JPX-Nikkei 400 (Periodic Review) Nikkei Inc. / Japan Exchange Group Inc. / /