How to say "transmission" in Japanese

• 発信はっしんCommon
  noun, suru verb, transitive verb, intransitive verbCovers transmission in the sense of dispatching or sending something out from the sender's side, such as a message or signal; the emphasis is on the act of originating the transmission.
• 通信つうしんJLPT N3approx.Common
  noun, suru verb, transitive verb, intransitive verbRefers to communication or correspondence, especially exchanging information over a distance; as 'transmission' it covers the broader activity of communicating rather than a single act of sending.
  彼かれは、無電むでんで通信つうしんを送おくった。↗

  He sent a message by wireless.
• 送信そうしんCommon
  noun, suru verb, transitive verbCovers transmission as the act of sending a message or data to a recipient; when 'transmission' means simply sending something off, this is the word to reach for.
  どの記者きしゃも、自分じぶんの書かいた記事きじをただちに送信そうしんした。↗

  Every reporter sent his stories with the least possible delay.
• 伝達でんたつJLPT N1approx.Common
  noun, suru verb, transitive verbCovers transmission as conveying or relaying something to a recipient, such as news, information, or signals; it also applies to the transmission of chemical signals and electricity.
  意思いし伝達でんたつは色々いろいろな形かたちをとる。↗

  Communication takes many forms.
• 伝播でんぱCommon
  noun, suru verb, intransitive verbTransmission as propagation or spread, of a disease or of ideas through a population or region; think 'spread' rather than a single act of sending.

Use 送信 for the act of sending a message or data, 発信 for dispatching from the sender's side, 通信 for correspondence and communication over a distance, 伝達 for relaying news or signals onward, and 伝播 for spread or propagation.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 発信はっしんdispatch
• 通信つうしんcorrespondence
• 送信そうしんtransmission
• 伝達でんたつtransmission (e.g. news, chemical signals, electricity)
• 伝播でんぱtransmission
• 伝導でんどうconduction (of heat or electricity)
• 透過とうかpenetration
• 配信はいしんdistribution (of information, news, etc.)
• 伝送でんそうtransmission
• 伝承でんしょうhanding down (information)
• トランスミッションtransmission (in a motor vehicle)
• 伝搬でんぱんtransmission
• 伝動でんどうtransmission (of motive power)
• 変速機へんそくきtransmission
• 送像そうぞうtransmission (of a television picture)
• 変速装置へんそくそうちgearbox
• 進達しんたつforwarding (to a higher authority, proper office, etc.)
• 送話そうわ(telephonic) transmission
• 転送てんそうtransfer (of data)
• 媒介ばいかいcarrying (germs, diseases, etc.)
• 伝来でんらいtransmission (through successive generations)
• 通りとおりtransmission (of sound)
• ミッションtransmission (in a motor vehicle)