Private company

DDI Corporation

DDI Corporation is a Japanese company based in Chiyoda, founded in 1984.¹ It was founded by Sachio Semmoto and Kazuo Inamori.¹

第二電電株式会社（だいにでんでん、英: DDI Corporation）は、かつて存在した日本の電気通信事業者で、現在のKDDIの前身企業の一つである。² From the Japanese Wikipedia, CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Jun 1984Founded¹

HeadquartersChiyoda, Japan¹
Websitewww.ddi.co.jp/home.html

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The story

Founded by Kazuo Inamori and Sachio Semmoto on Jun 1984.¹

Leadership

Who has led DDI Corporation, and when. Pick a name to see everywhere that person has worked.

FounderKazuo Inamori¹
FounderSachio Semmoto¹

Timeline

Jun 1984Founded Founded¹

Links

Websitewww.ddi.co.jp/home.html¹
WikidataQ11602339

Sources

The numbers on this page point here. Each one links to the record it came from.

1
WikidataDDI Corporation on Wikidata
2
WikipediaDDI Corporation on the Japanese Wikipedia