| アイエスオー | International Organization for Standardization | |
| アイエルオー | International Labor Organization (Labour, Organisation), ILO | |
| アサヒテック | Asahi Tec Corporation | |
| アルカイダ | Al qaida | |
| イズミデンキ | IDEC Izumi Corporation | |
| イナカワカイ | Inagawa-kai (yakuza syndicate) | |
| イルミナティ | Illuminati | |
| イーエフエフ | Electronic Frontier Foundation, EFF | |
| ウトクウンユ | Utoc Corporation | |
| ウラワレッズ | (abbr) Urawa Red Diamonds (Japanese pro soccer team) | |
| エスエスアイ | SSI, Scuba Schools International | |
| エスエーエス | Special Air Service (UK, Australia, etc.), SAS | |
| エフビーアイ | Federal Bureau of Investigation, FBI | |
| エーアイアイ | AII, Association of International Instructors, US YMCA diving education system founded 1959 | |
| エーエヌシー | African National Congress, ANC | |
| オモテセンケ | Omote Senke (school of tea ceremony) | |
| カナモジカイ | Kana Moji Kai (organization est. in 1920 to promote kana as the main form of written Japanese) | |
| カージナルス | Cardinals (US baseball team) | |
| ガイムショウ | Ministry of Foreign Affairs | |
| クロイクガツ | Black September (Palestinian extremist group responsible for the massacre of Israeli athletes at the Munich Olympics) | |
| クロイクガツ | Black September (Palestinian extremist group responsible for the massacre of Israeli athletes at the Munich Olympics) | |
| ケイダンレン | Japan Federation of Economic Organizations | |
| ケーケーケー | Ku Klux Klan, KKK | |
| ゲンヨウシャ | Dark Ocean Society (1881-1946), Black Ocean Society | |
| ゲーペーウー | State Political Directorate (USSR - Gosudarstvennoye Politicheskoye Upravlenye), State Political Administration, GPU | |
| コウタイレン | (abbr) All Japan High School Athletic Federation | |
| サンソウケン | National Institute of Advanced Industrial Science and Technology (abbr), AIST | |
| ザイトクカイ | Zaitokutai (abbr), Zainichi Tokken o Yurusanai Shimin no Kai (The Citizens Group That Will Not Forgive Special Privileges for Koreans in Japan) | |
| ザイムショウ | Ministry of Finance | |
| ジャイアンツ | Giants (baseball team) | |
| ジャスラック | Japanese Society for Rights of Authors, Composers and Publishers, JASRAC | |
| スミソニアン | Smithsonian Institution | |
| スミヨシカイ | Sumiyoshi-kai (yakuza syndicate) | |
| センダイハギ | Sendaihagi | |
| ゼンガクレン | All-Japan Federation of Student Self-Government Associations (abbr), Zengakuren | |
| ソウムショウ | Ministry of Internal Affairs and Communications (formerly Ministry of Public Management, Home Affairs, Posts and Telecommunications) | |
| タスツウシン | TASS News Agency | |
| ダンディーズ | Dandi-zu (rock band) | |
| チギンキョウ | (abbr) Regional Banks Association of Japan | |
| チチブオノダ | Chichibu Onoda Cement Corporation | |
| ディスコント | discont | |
| デンソウケン | Electro-technical Laboratory (abbr), ETL | |
| ニチベンレン | (abbr) Japan Federation of Bar Associations | |
| ニッキョウソ | (abbr) Japan Teachers' Union, JTU | |
| ニッケイレン | Japan Federation of Employers' Associations (abbr) | |
| ニッタイダイ | Nippon Sport Science University (abbr) | |
| ニッツウコウ | Nitsuko Corporation | |
| ニッポンハム | Nippon Ham, Nippon Meat Packers (Japanese meat packing firm) | |
| ニホンカイギ | Nihon Kaigi, Japan Conference | |
| ニホンキイン | Nihon Kiin (national go organization of Japan) | |
| ノウムショウ | Department of Agriculture (e.g. of the USA) | |
| ヒカルゲンジ | Hikaru Genji (music group) | |
| ヒロシマガス | Hiroshima Gas | |
| ビービーシー | British Broadcasting Corporation, BBC | |
| ピーエルオー | Palestine Liberation Organization (PLO) | |
| フジピーエス | Fuji P.S Corporation | |
| ブキガッコウ | Ordnance School | |
| ヘイミンシャ | Plebian Society (ca. 1904) | |
| ベイスターズ | Baystars (i.e. Yokohama DeNA Baystars baseball team) | |
| ホアンチョウ | (National) Security Board | |
| ホウムショウ | Ministry of Justice | |
| ミンシントウ | Democratic Progressive Party | |
| ミンジキョク | Civil Affairs Bureau | |
| メイコウダイ | (abbr) Nagoya Institute of Technology, NIT | |
| モナシュダイ | Monash University | |
| モンブショウ | (abbr) Ministry of Education, Culture, Sports, Science and Technology, MEXT | |
| ヤマグチグミ | Yamaguchi-gumi (yakuza syndicate) | |
| ヨンデンコウ | Yondenko Corporation | |
| レイメイカイ | Reimeikai, progressive political society at various universities in Japan (1918-1920) | |
| ローマクラブ | Club of Rome (global think tank) | |
