展開|てんかいtenkai[0]heiban (flat)
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- noun, suru verb, transitive verb, intransitive verbdevelopment; evolution; progression; unfolding; (plot) twist
- noun, suru verb, transitive verb, intransitive verbexpansion; spreading out; extending; deployment; building up
- noun, suru verb, transitive verb, intransitive verb, mathexpansion (of an algebraic expression)
- noun, suru verb, transitive verb, intransitive verb, mathdevelopment (of a three-dimensional shape)
- noun, suru verb, transitive verb, intransitive verb, computingextraction (of compressed data); decompression; unpacking
- noun, suru verb, transitive verb, businesssharing (information)
Conjugation
| Dictionary form | 展開する(てんかいする) |
|---|---|
| Polite (masu) | 展開します(てんかいします) |
| Negative (nai) | 展開しない(てんかいしない) |
| polite (masen) | 展開しません(てんかいしません) |
| classical zu / nu | 展開せず・展開せぬ(てんかいせず・てんかいせぬ) |
| Past (ta) | 展開した(てんかいした) |
| polite (mashita) | 展開しました(てんかいしました) |
| Past negative (nakatta) | 展開しなかった(てんかいしなかった) |
| polite (masen deshita) | 展開しませんでした(てんかいしませんでした) |
| Te form | 展開して(てんかいして) |
| Potential | 展開できる(てんかいできる) |
| Passive | 展開される(てんかいされる) |
| Causative | 展開させる(てんかいさせる) |
| Causative passive | 展開させられる(てんかいさせられる) |
| Conditional (ba) | 展開すれば(てんかいすれば) |
| tara | 展開したら(てんかいしたら) |
| Volitional | 展開しよう(てんかいしよう) |
| polite (mashou) | 展開しましょう(てんかいしましょう) |
| Imperative | 展開しろ(てんかいしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym発展はってんNeutralRefers to growth in scale or level, as in 「経済発展」; 「展開」 centers on a plot or situation unfolding and moving ahead.
- Synonym進展しんてんWrittenWritten/formal prose for a matter moving forward, as in 「交渉が進展する」; stresses that real progress is being made.
- Synonym拡張かくちょうNeutralWidening a range or adding functions, as in 「道路拡張」, usually a planned build-out; it names the enlargement itself, while 「展開」 traces how things unfold.
- Synonym繰り広げるくりひろげるNeutralA verb for staging a series of scenes or activities, as in 「熱戦を繰り広げる」; stresses scenes unfolding one after another.
- Related発達はったつNeutralDescribes gradual maturing of body, mind, or skills, as in 「脳の発達」— growing toward a fuller state rather than unfolding.
- Related進歩しんぽNeutralMeans progress in a good direction, as in 「技術の進歩」, and carries a positive evaluation that 「展開」 lacks.
- Related進化しんかNeutralCovers biological evolution or the step-by-step upgrading of things, as in 「スマホの進化」— evolution, not unfolding.
- Related成長せいちょうNeutralUsed for the growth of living things, people, or the economy, as in 「経済成長」; 「展開」 never refers to growing up.
- Related開発かいはつNeutralMeans developing resources or new products, as in 「新製品の開発」, with the focus on creating rather than unfolding.
- Related拡大かくだいNeutralRefers to growth in scale or scope, as in 「被害が拡大する」; 「展開」 follows a course of events rather than simply enlarging.
- Related伸展しんてんWrittenWritten/formal term for influence or scale stretching out and growing, whether pushed or on its own; about getting bigger, not 「展開」's sense of unfolding.
- Antonym収束しゅうそくWrittenWritten/formal word for a situation settling down or being wound up; the opposite of 「展開」 spreading things out.
- Antonym終結しゅうけつWrittenWritten/formal word for coming to an end, as in 「戦争が終結する」; stands opposite to 「展開」's unfolding.
Use 「展開」 for how a plot, situation, or business unfolds and moves forward. For growth in scale pick 「発展」 or 「拡大」, for progress in a matter 「進展」, for improvement 「進歩」, for scenes unfolding one after another 「繰り広げる」. 「発達」「成長」 cover maturing, 「進化」 upgrading, 「開発」 creating, 「拡張」 widening range or functions, 「伸展」 influence or scale stretching out; 「収束」「終結」 are the opposites.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


