How to say "progression" in Japanese

• 展開てんかいJLPT N2approx.Common
  noun, suru verb, transitive verb, intransitive verbCovers progression as the unfolding of events: how a story, plot, or argument develops from stage to stage. Typical when discussing the course a narrative or situation takes.
  その事件じけんの展開てんかいについて引き続ひきつづきお知しらせ下ください。↗

  Please keep me informed of the development of the case.
• 発展はってんJLPT N3approx.Common
  noun, suru verb, intransitive verbCovers progression as advancement: a situation or story moving forward and growing into a further stage. Fits when the emphasis is on forward development rather than the step-by-step course.
  私達わたしたちの関係かんけいが発展はってんすることを希望きぼうしています。↗

  I hope to see our relationship expand.

Use 展開 for progression as the step-by-step unfolding of a plot, argument, or course of events, and 発展 for progression as advancement or growth of a situation toward a further, more developed stage.

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

• 展開てんかいdevelopment
• 数列すうれつsequence
• 進行しんこうprogression (of a disease, global warming, etc.)
• 発展はってんdevelopment (of a situation, story, etc.)