How to say "propagation" in Japanese

Choosing the right word
  • 布教ふきょうCommon
    noun, suru verb, transitive verbCovers propagation in the religious sense: spreading a faith, proselytizing, missionary work. Use it when 'propagation' means winning converts rather than any physical or biological spreading.
    いつ返かえしてもらってもいいですよ。その本ほんは布教ふきょう用ように買かった本ほんですから。↗
    You can give it back whenever you want to as I bought that book for missionary work.
  • 繁殖はんしょくJLPT N1approx.Common
    noun, suru verb, intransitive verbCovers the biological sense: breeding, reproduction, multiplication. Use it when 'propagation' means producing new plants or animals, as in plant propagation or animal breeding.
    8月がつ下旬げじゅんに彼かれらは繁殖はんしょくのために長ながい旅たびに出発しゅっぱつします。↗
    In late August, they set off on a long journey for breeding.
  • 増殖ぞうしょくCommon
    noun, suru verb, transitive verb, intransitive verbCovers propagation as proliferation: things multiplying or increasing in number. Typical of scientific contexts such as cells or bacteria proliferating; it emphasizes growth in quantity rather than spread to new places.
  • 伝播でんぱCommon
    noun, suru verb, intransitive verbCovers propagation as spread or transmission: something passing from place to place or person to person, such as a disease, news, or a wave. It pictures the thing spreading outward.
  • 伝達でんたつJLPT N1approx.Common
    noun, suru verb, transitive verbReally means transmission, communication, or delivery: conveying news, signals, or messages to someone. For English 'propagation' it fits only loosely, when the idea is relaying something onward rather than spreading or multiplying.
    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.

For 'propagation', pick 布教 for spreading a religion, 繁殖 for biological reproduction, 増殖 for proliferation or multiplication, 伝播 for something spreading or being transmitted, and 伝達 only for relaying messages or signals.

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

Japanese equivalents
See also

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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