Changes

| 1985–1992 || Nippon Telegraph and Telephone Corporation (NTT) prelude era.

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| 1952 || || Prelude || [[w:Nippon Telegraph and Telephone|Nippon Telegraph and Telephone Public Corporation]] (NTTPC) is founded.<ref name="fundinguniverse.com">{{cite web |title=Nippon Telegraph and Telephone Corporation History |url=http://www.fundinguniverse.com/company-histories/nippon-telegraph-and-telephone-corporation-history/ |website=fundinguniverse.com |accessdate=15 October 2019}}</ref>

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| 1991 || August || Founding || NTT Mobile Communications Network is established as a {{w|spin-off}} by the {{w|Nippon Telegraph and Telephone}} (NTT) to take over the mobile cellular operations.<ref>{{cite web |title=NTT DoCoMo |url=https://www.pcmag.com/encyclopedia/term/48149/ntt-docomo |website=pcmag.com |accessdate=15 October 2019}}</ref><ref>{{cite book |last1=Jain |first1=Vipul |title=Recent Trends in Intelligent Computing, Communication and Devices |url=https://books.google.com.ar/books?id=vUuzDwAAQBAJ&pg=PA1063&lpg=PA1063&dq=August+14,+1991+%22DOCOMO%22&source=bl&ots=QY_R6wQt54&sig=ACfU3U23aehqGfjuSOVoQEEZ5esKOZAwyw&hl=en&sa=X&ved=2ahUKEwjx4ouXjZ_lAhUZILkGHW8YC08Q6AEwCnoECAoQAg#v=onepage&q=August%2014%2C%201991%20%22DOCOMO%22&f=false}}</ref><ref name="crunchbase.com">{{cite web |title=NTT DoCoMo |url=https://www.crunchbase.com/organization/ntt-docomo#section-overview |website=crunchbase.com |accessdate=15 October 2019}}</ref>

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| 1993 || March || Service || NTT MCN Launches mova 2G (800 MHz) digital cellular phone service.<ref name="History"/>

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| 1993 || || Administration || NTT MCN establishes its Main Sales Division.<ref name="docomo-sys.co.jp"/>

| 1999 || || Personnel || NTT MCN reaches 500 employees.<ref name="docomo-sys.co.jp"/>

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| 2003 || January 14 || {{w|Market penetration}} || DoCoMo i-shot handsets (camera phone) sales exceed 5 million.<ref name="dd">{{cite web |title=DoCoMo Camera Phone Sales Exceed 5 Million |url=https://www.nttdocomo.co.jp/english/info/media_center/pr/2003/000928.html |website=nttdocomo.co.jp |accessdate=12 November 2019}}</ref>

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| 2007 || October || Product || The {{w|prototype}} [[w:wellness (alternative medicine)|Wellness]] {{w|mobile phone}} of {{w|NTT Docomo}} and {{w|Mitsubishi Electric Corp.}} is launched at annual Japanese trade show {{w|CEATEC}}. It checks health with a motion sensor that detects body movement and measures calories, and includes a {{w|breathalyzer}}.<ref>{{cite web|url=https://web.archive.org/web/20071029053227/http://ap.google.com/article/ALeqM5hhzZNK2Qh8nBS4H9Tt_lDecgBE9QD8S3IR880|title=The Associated Press: New Prototype Phone Gives Fitness Check|author=|date=29 October 2007|website=archive.org|accessdate=12 September 2019}}</ref>

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| 2008 || February || {{w|Joint venture}} || NTT Investment Partners, Inc. (NTT-IP) is estqablished as a corporate venture capital firm by [[w:Nippon Telegraph and Telephone|Nippon Telegraph]] and Telephone Corporation (NTT). The firm focuses on funding advanced/disruptive technologies, services and business models around the world and looks to leverage NTT Group companies’ business operations, technologies and vast network to its portfolio companies.

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| 2010 || June || {{w|Market penetration}} || {{w|Tata Docomo}} reaches about 32.82 million users.<ref>{{cite web |title=joint-venture.ppt |url=https://www.scribd.com/presentation/251917548/joint-venture-ppt |website=scribd.com |accessdate=12 November 2019}}</ref>

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| 2014 || || Service || Under Civil Protection Law of Japan, Docomo begins offering a service called the "Area Mail Disaster and Evacuation Information Service" which broadcasts {{w|J-Alert}} messages (including Earthquake Early Warning) produced by the Japan Fire and Disaster Management Agency to its subscribers with compatible handsets (e.g. Sony XPERIA, iPhone 5s, Samsung Galaxy).<ref>{{cite web|url=https://www.nttdocomo.co.jp/info/news_release/2014/03/28_00.html|title=緊急速報「エリアメール」、及び「緊急速報メール」を利用した国民保護に関する情報の配信を開始|accessdate=12 September 2019}}</ref>

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| 2017 || November 28 || Product || In collaboration with international digital security company {{w|Gemalto}}, NTT DOCOMO announces development of the world's first multi-profile SIM "for use through multi-carrier collaborations that can allow users to switch between profiles, which include data such as contract information and telephone numbers, on their smartphone or tablet in each country."<ref>{{cite web |title=DOCOMO Develops Multi-Profile SIM for Smartphones and Tablets |url=https://www.nttdocomo.co.jp/english/info/media_center/pr/2017/1128_00.html |website=nttdocomo.co.jp |accessdate=12 November 2019}}</ref>

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