1995 November Jointly established through investments by Sony Corporation, Sony Music Entertainment (Japan), Inc., and Sony Finance International, Inc.
1996 January Launched So-net Internet connection service.
1997 November Released PostPet DX mail software.
1999 November Became the first Internet service provider (ISP) to obtain Privacy Mark.
2002 May Launched "So-net Hikari", a fiber-to-the-home (FTTH) connection service.
2003 June Became the first domestic ISP to obtain certification for both international information security management standard (ISMS) BS7799 (currently ISO/IEC 27001:2005) and domestic ISMS designation standard (currently JIS Q 27001:2006).
2005 December Listed on TSE Mothers.
2006 October Changed company name to So-net Entertainment Corporation.
2007 July Established MotionPortrait, Inc.
August Acquired So-net Entertainment Taiwan Ltd. as a consolidated subsidiary.
November Relocated headquarters to Osaki, Shinagawa-ku, Tokyo.
2008 January Listed on TSE 1st Section.
July Acquired So-net Media Networks Corporation as a consolidated subsidiary.
2009 March So-net Entertainment Taiwan Ltd. signed a capital/business partnership contract with Chunghwa Telecom Co., Ltd. (CHT).
2010 February Acquired the ISP business from USEN CORPORATION.
2012 July Established Sony Biz Networks Corporation.
December Delisted from TSE 1st Section.
2013 January Became a wholly-owned subsidiary of Sony Corporation.
April Launched "NURO Hikari".
July Changed company name to So-net Corporation.
2014 April Integrated “bit-drive” business, the Sony Business Solutions Corporation IT solutions service for corporations.
2015 January Began accepting applications for “NURO Hikari for Mansion”
February Launched “So-net Hikari Collaboration”
2016 Mar Became a subsidiary of Sony Mobile Communications Inc.
May Relocated headquarters to Higashi-shinagawa, Shinagawa-ku, Tokyo.
July Changed company name to Sony Network Communications Inc.