Source: The company was established as Mediopia in May 1993 and later renamed as Mediopia Technology Co., Ltd in June 1994, as a manufacturer and distributor of electronic devices. In January 2002, the company was listed on KOSDAQ. In August 2004, Maekyung Hudson was incorporated as a subsidiary. In July 2006, the largest shareholder changed from Poibos Co., Ltd. to CJ Corporation and was incorporated as an affiliate of CJ Corporation. The company later became a part of CJ Media Co., Ltd. In September 2006, the company was later established again as Mnet Media, following the merge with GM Agency, MaxMP3 and ID Icheon Entertainment. In January 2007, the company established entertainment company Core Contents Media, which was headed by producer Kim Kwang-soo. In May 2007, CJ Music was merged into Mnet Media, which was operated in the music distribution and broadcasting businesses. In January 2011, Mnet Media was merged into CJ E&M and renamed as CJ E&M Music. Following the merge, the company was revoked from the KOSDAQ listing in March 2011. In December 2013, CJ E&M Music acquired 19% of Jellyfish Entertainment's shares to form a partnership. In March 2014, the CJ E&M label system was introduced with Jellyfish Entertainment, The Music Works, MMO Entertainment, and 1877 Entertainment joining the system. In April 2014, CJ E&M Music launched a joint venture with Japan's Victor Entertainment, which was called CJ Victor Entertainment. In September 2015, CJ E&M Music acquired B2M Entertainment. In October 2015, CJ E&M Music signed a strategic partnership deal with hip hop label Hi-Lite Records. In January 2016, CJ E&M Music signed a strategic partnership deal with hip hop label AOMG. In 2017, CJ E&M Music established a new label named Stone Music Entertainment. The label began produce music for artists under CJ E&M Music, such as Wanna One, Davichi, and JBJ, and managed Idol School's winning group, Fromis 9. In August 2017, CJ E&M Music established the High Up Entertainment joint venture with producer team Black Eyed Pilseung. In the same months, CJ E&M acquired an additional 32% of Jellyfish Entertainment's shares, beyond the 19% of the label's shares previously acquired in 2013, effectively becoming the label's largest shareholder, with a total of 51%. In November 2017, CJ E&M Music acquired Amoeba Culture. In April 2018, Stone Music Entertainment was officially registered and CJ E&M later merged into Stone Music Entertainment in May 2018. In June 2018, Stone Music Entertainment established the exclusive label Swing Entertainment for managing Wanna One since the latter ended their contract with YMC Entertainment, with Shin Dong-il as the label head. In September 2018, Stone Music Entertainment established the exclusive label Off The Record Entertainment for managing the Produce 48 winners, Iz*One, and Idol School winners Fromis 9. In October 2018, Genie Music acquired distribution rights to Stone Music Entertainment's releases in digital format after it merged with the latter's sister company, CJ Digital Music. The two companies will still release physical albums separately. On January 31, Stone Music Entertainment confirmed the establishment of exclusive label, LM Entertainment for managing Kang Daniel and Yoon Jisung since February 1, following the ended their contract with MMO Entertainment. The label known head by Shin Dong-il who also head their former label Swing Entertainment during Wanna One active.
