- 1995
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- November
- Jointly established through investments by Sony Corporation, Sony Music Entertainment (Japan), Inc., and Sony Finance International, Inc.
- 1996
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- January
- Launched So-net Internet connection service
- 1997
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- November
- Released pet e-mail software “PostPet DX”
- 1999
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- November
- Became the first Internet service provider (ISP) to obtain Privacy Mark
- 2002
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- May
- Launched a fiber-To-The-Home (FTTH) connectivity service
- 2003
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- 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
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- December
- Listed on the Tokyo Stock Exchange Mothers Index
- 2006
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- October
- Changed company name to So-net Entertainment Corporation
- 2007
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- November
- Relocated headquarters to Osaki, Shinagawa-ku, Tokyo
- 2008
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- January
- Listed on the First Section of the Tokyo Stock Exchange
- 2010
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- February
- Acquired the ISP business from USEN Corporation
- 2012
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- December
- Delisted from the First Section of the Tokyo Stock Exchange
- 2013
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- January
- Became a wholly owned subsidiary of Sony Corporation
- April
- Launched “NURO Hikari” ultra-fast fiber-optic Internet service
- July
- Changed company name to So-net Corporation
- 2015
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- February
- Launched optical collaboration model FTTH services
- June
- Launched FTTH services with a maximum downlink speed of approx. 10 Gbps with “NURO Hikari”
- 2016
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- March
- Became subsidiary of Sony Mobile Communications Inc.
- May
- Relocated headquarters to Higashi-Shinagawa, Shinagawa-ku, Tokyo
- July
- Changed company name to Sony Network Communications Inc.
- September
- Renewed LTE Communications Service, launched “nuro Mobile” (currently “NURO Mobile”)
- 2018
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- March
- Launched FTTH services with maximum uplink and downlink speeds of approx. 10 Gbps with “NURO Hikari”
- October
- Launched “MANOMA”, a smart home service
- 2019
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- September
- Launched “ELTRES™ IoT Network Service”, a connectivity service specific to IoT using LPWA communication standards
- 2020
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- March
- Added new service plan “NURO Hikari 20 Gs”, with maximum uplink and downlink speeds of approx. 20 Gbps
- 2021
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- September
- Expanded “NURO” into a comprehensive network service brand
- 2022
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- October
- Relocated headquarters to Konan, Minato-ku, Tokyo
