- 海岸管理者 (Coastal Administrator)
- 海岸局 (Coast Station)
- 海岸地球局 (Coast Earth Station)
- 海岸保全施設 (Coastal Conservation Facilities)
- 外国公館の無線局 (Radio Stations Established for the Purpose of Official Service, in an Embassy, Legation, or Consulate)
- 外国人等議決権割合 (Ratio of the Number of Voting Rights Held by the Foreign Juridical Person, etc.)
- 外国人等の電気通信業務用無線局 (Radio Station Established by Foreigners etc. for the Purpose of Conducting Telecommunications Services)
- 外国人等の陸上移動業務無線局 (Radio Station Established by Foreigners etc. for the Purpose of Conducting Land Mobile Service)
- 外国人のアマチュア局の開設 (Amateur Station Established by Foreigners)
- 外国人向け協会国際衛星放送(International Satellite Broadcasting by NHK for Overseas Foreign Nationals)
- 外国人向け国際放送(International Broadcasting for Overseas Foreign Nationals)
- 外国性の排除 (Exclusion of Foreign Property)
- 外国性排除の例外 (Exception of Exclusion of Foreign Property)
- 外国点検事業者 (Foreign Inspector)
- 外国取扱業者 (Foreign Dealer)
- 外国の政府 (Foreign Government)
- 外国の団体 (Foreign Organization)
- 外国の法人 (Foreign Juridical Person)
- 外国放送事業者(Foreign Broadcaster)
- 開示関係役務提供者 (Provider of Disclosure-related Service Providers)
- 海上移動衛星業務 (Maritime Mobile-Satellite Service)
- 海上移動業務 (Maritime Mobile Service)
- 海上人命安全条約 (The International Convention for the Safety of Life at Sea)
- 海上無線航行業務 (Maritime Radionavigation Service)
- 開設計画 (Establishment Plan)
- 開設指針 (Establishment Guidelines)
- 開設の目的 (Purpose of Establishment)
- 開設を必要とする理由 (Necessity for Establishing the Radio Station)
- 改善命令等 (Order to Improve, etc.)
- 外部参照信号同期機能(External reference signal synchronization function)
- カウンターポイズ (Counterpoise)
- 架空電子メールアドレス(Fictitious Electronic Mail Address)
- 角度変調 (Angle-Modulation)
- 河川(River)
- 仮想移動電気通信サービス (Virtual mobile communications service)
- 型式検定 (Type Examination)
- 型式検定の対象機器 (Equipment to be Subjected to Type Examination)
- 型式検定の手続 (Procedure for Type Examination)
- 可聴音 (Audible sound)
- 学校卒業者に与えられる無線従事者の資格・免許 (Qualification and Licensing of Radio Operators Given to School Graduates)
- 学校認定 (Authorization of School)
- 画面内予測符号化方式(In-Screen Prediction Coding System)
- 可変長符号化方式(Variable Length Coding System)
- 仮理事(Provisional Directors)
- 簡易な免許手続 (Simplified Licensing Procedure)
- 簡易無線業務 (Simple Radio Service)
- 簡易無線業務用無線局 (Radio Station for the Purpose of Conducting Simple Radio Service)
- 簡易無線局 (Simplicity Radio Station)
- 関係役務提供者 (Provider of related service)
- 監視部門 (Supervision division)
- 監督対象子会社 (Subsidiary subject to supervision)
- 感度抑圧効果(Blocking)
- 関門交換機 (Inter-gateway switch)