List of companies of Japan
file:Japan.svg|thumb|Location of Japan
This is a list of notable companies based in Japan. For further information on the types of business entities in this country and their abbreviations, see "Types of [business entity#Japan|Business entities in Japan]". Note that 株式会社 can be read both kabushiki kaisha and kabushiki gaisha.
Largest firms
This list shows firms in the Fortune Global 500, which ranks firms by total revenues reported before 31 March 2017.C
D
| English | Japanese | Rōmaji | TSE |
| Dai-ichi Life | 第一生命保険株式会社 | Dai-ichi Seimei Hoken Kabushiki-kaisha | |
| Dai Nippon Printing | 大日本印刷株式会社 | Dai Nippon Insatsu Kabushiki Kaisha | |
| Daicel | 株式会社 ダイセル | Kabushiki gaisha Daiseru | |
| Daiei | 株式会社ダイエー | Kabushiki-gaisha Daiē | |
| Daifuku | 株式会社ダイフク | Kabushiki-gaisha Daifuku | |
| Daihatsu | ダイハツ工業株式会社 | Daihatsu Kōgyō Kabushiki-gaisha | |
| Daiichi Sankyo | 第一三共株式会社 | Daiichi Sankyō Kabushiki-gaisha | |
| Daikin Industries | ダイキン工業株式会社 | Daikin Kōgyō Kabushiki-gaisha | |
| Daikyo | 株式会社大京 | Kabushiki-gaisha Daikyō | |
| Daimaru | 株式会社大丸 | Kabushiki-gaisha Daimaru | |
| Dainippon [Sumitomo Pharma] | 大日本住友製薬株式会社 | Dainippon Sumitomo Seiyaku Kabushiki-gaisha | |
| Daiso | 株式会社大創産業 | Kabushikigaisha Daisōsangyō | |
| Daiwa House Industry | 大和ハウス工業 | Daiwa Hausu Kōgyō | |
| Daiwa Securities | 大和証券グループ本社 | Daiwa Shōken Gurūpu Honsha | |
| Denka | デンカ株式会社 | Denka Kabushiki-gaisha | |
| Denon | 株式会社デノン | Kabushiki Kaisha Denon | |
| Denso | 株式会社デンソー | Kabushiki-gaisha Densō | |
| Dentsu | 株式会社電通 | Kabushiki-gaisha Dentsū | |
| Descente | 株式会社デサント | Kabushiki-gaisha Desanto | |
| Digital Frontier | 株式会社デジタル・フロンティア | Kabushiki-gaisha Digital Frontier | |
| DIC Corp. | DIC株式会社 | DIC Kabushiki-gaisha | |
| Disco Corporation | 株式会社ディスコ | Kabushiki-gaisha Disuko | |
| DigiOn | デジオン | Diji-on | |
| DMG [Mori Seiki Co.|DMG Mori Seiki] | DMG森精機株式会社 | DMG Mori Seiki Kabushiki-gaisha | |
| Dome | 株式会社童夢 | Kabushiki Kaisha Dōmu | |
| Don Quijote | 株式会社ドン・キホーテ | Kabushiki gaisha Don Kihōte | |
| Dowa Holdings | DOWAホールディングス株式会社 | DOWA Hōrudingusu Kabushiki-gaisha | |
| Dwango | 株式会社ドワンゴ | Kabushiki-gaisha Dowango | |
| Dynic Corporation | ダイニック株式会社 | Dainikku Kabushiki-gaisha |
E
| English | Japanese | Rōmaji | TSE |
| East Japan Railway Company | 東日本旅客鉄道株式会社 | Higashi-Nihon Ryokaku Tetsudō Kabushiki-gaisha | |
| Ebara Corporation | 荏原製作所 | Kabushiki-gaisha Ebara Seisakusho | |
| Eiken Chemical | 栄研化学株式会社 | Eiken Kagaku Kabushiki-gaisha | |
| Eisai | エーザイ株式会社 | Ēzai Kabushiki-gaisha | |
| Eizo | EIZO株式会社 | EIZO Kabushiki-gaisha | |
| Electric Power Development Company | 電源開発株式会社 | Dengen Kaihatsu Kabushiki-gaisha | |
| Enkei Corporation | エンケイ株式会社 | Enkei Kabushiki-gaisha | |
| Ezaki Glico | 江崎グリコ株式会社 | Ezaki Guriko Kabushiki-gaisha | |
| Eco Marine Power |
I
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R
V
Former companies, including acquired and merged ones
- Bandai and Namco - Merged to form Bandai Namco Entertainment
- Data East - went into Bankruptcy
- Dream Stage Entertainment
- Daiei Film - went into Bankruptcy, later became part of Tokuma Shoten and now part of Kadokawa Pictures
- Japanese National Railways 日本国有鉄道 - Reorganized into Japan Railways Group
- Japan Post 日本郵政公社 - Reorganized into Japan Post Group
- Koei and Tecmo - Merged to form Koei Tecmo
- Konica and Minolta - Merged to form Konica Minolta
- Prince Motor merged into Nissan
- Spike and Chunsoft - Merged to form Spike Chunsoft
- Square and Enix - Merged to form Square Enix
- Daiichi Pharmaceutical Co. and Sankyo Co. - Merged to form Daiichi Sankyo
- Takata Corporation - went bankrupt then was acquired by Joyson Safety Systems
- Yamanouchi Pharmaceutical and Fujisawa Pharmaceutical - Merged to form Astellas Pharma
- Yaohan
- Tomen - Acquired by Toyota Tsusho
- Nichimen and Nissho Iwai - Merged to form Sojitz