iXIT

Index Corporation Ltd. was founded on 1 September 1995 as a mobile content service provider. It adopted the name of Index by 1997 and expanded into one of Japan's most successful companies, with acquisitions into several communications and entertainment ventures, including the anime studio Madhouse, game companies Atlus and Interchannel, and major movie studio Nikkatsu. It also made inroads into numerous worldwide ventures, including the United States, United Kingdom and France, where it owned the football club Grenoble Foot 38, which, upon Index's acquisition, achieved promotion to Ligue 1. Up to 2013, Index Corporation had sold most of its subsidiaries. In June 2013, following investigations for fraud, Index Corporation was forced to file for civil rehabilitation bankruptcy.

On November 9, 2010, Index Holdings (株式会社インデックス・ホールディングス) announced its renaming to Index Corporation (株式会社インデックス), to be confirmed on the 15th shareholders meeting on November 25, 2010, effective on December 1, 2010. On June 27, 2013, following an investigation for fraud, Index Corporation filed for civil rehabilitation bankruptcy due to a debt consisting of 24.5 billion yen.

On September 18, 2013, it was reported that Sega Sammy Holdings had won a bid to acquire Index for 14 billion yen. Sega Sammy Holdings denied taking over Index Corporation at first, however it announced later that day that Index Corporation would sell the digital game business, contents and solution business, and amusement business to Sega Dream Corporation (株式会社セガドリーム), a subsidiary of Sega Corporation established on September 5, 2013, effective on November 1, 2013. The sales covered fixed assets and intellectual property assets of the announced operations, which included Atlus Holding, Inc. (parent company of Index Digital Media, Inc.), Tiger Mob Limited, Index Corp (Thailand) Ltd., Mobi Town Ltd. However, liabilities including interest-bearing debts would not be taken over. On November 1, 2013, Sega announced that it will rename its subsidiary, Sega Dream Corporation, to Index Corporation (株式会社 インデックス). On February 18, 2014, Sega and Index Corporation announced the separation of Index Corporation's contents and solution businesses into a new subsidiary under the name 'Index Corporation' (株式会社インデックス), while renaming the 'old' Index Corporation and its remaining digital game business division into 'Atlus' (株式会社アトラス), effective on April 1, 2014. The new Atlus would also include the foreign subsidiary Index Digital Media, Inc., which would be renamed to Atlus U.S.A., Inc. at the effective establishment day of the new Atlus.

On May 28, 2014, Masami Ochiai, chairman of the former Index Corporation, and his wife Yoshimi Ochiai, president of the company, were arrested by the Tokyo District Public Prosecutors Office on suspicion of falsifying stock reports for the company.

On December 1, 2015, as part of a structural reform within the Sega Sammy Holdings group, Sega Holdings sold its shares of Index Corporation to Sawada Holdings, a firm owned by H.I.S. founder Hideo Sawada. Through this business transfer, Index Corporation became a wholly owned subsidiary of Sawada Holdings. On July 1, 2016, Index Corporation changed its name to iXIT Corporation.