観察|かんさつkansatsu[0]heiban (flat)
This browser can't play pronunciations (needs Safari 18.4 or later, or Chrome / Edge / Firefox).
- noun, suru verb, transitive verbobservation; survey; watching
Conjugation
| Dictionary form | 観察する(かんさつする) |
|---|---|
| Polite (masu) | 観察します(かんさつします) |
| Negative (nai) | 観察しない(かんさつしない) |
| polite (masen) | 観察しません(かんさつしません) |
| classical zu / nu | 観察せず・観察せぬ(かんさつせず・かんさつせぬ) |
| Past (ta) | 観察した(かんさつした) |
| polite (mashita) | 観察しました(かんさつしました) |
| Past negative (nakatta) | 観察しなかった(かんさつしなかった) |
| polite (masen deshita) | 観察しませんでした(かんさつしませんでした) |
| Te form | 観察して(かんさつして) |
| Potential | 観察できる(かんさつできる) |
| Passive | 観察される(かんさつされる) |
| Causative | 観察させる(かんさつさせる) |
| Causative passive | 観察させられる(かんさつさせられる) |
| Conditional (ba) | 観察すれば(かんさつすれば) |
| tara | 観察したら(かんさつしたら) |
| Volitional | 観察しよう(かんさつしよう) |
| polite (mashou) | 観察しましょう(かんさつしましょう) |
| Imperative | 観察しろ(かんさつしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym観測かんそくWrittenWritten word for observing and measuring natural phenomena, or for inferring how things will develop, as in 「希望的観測」; 「観察」 focuses on closely examining a state.
- Synonym監視かんしNeutralNeutral word for continuous watching to catch abnormalities fast; targets can be people, equipment or water levels, while 「観察」 just means looking closely at a state.
- RelatedウォッチングCasualColloquial loanword used mostly in compounds like 「バードウォッチング」, with a hobby or interest flavour.
- Related観覧かんらんWrittenWritten word for viewing and enjoying paintings, plays or scenery, as in 「観覧車」; it stresses appreciation, while 「観察」 stresses study.
- Related検分けんぶんFormalFormal word for going to a site and checking things on the spot, as in a site inspection; 「観察」 carries no duty to inspect.
- RelatedマークCasualColloquial loanword for keeping close watch on a person, e.g. marking an opponent in sport; 「観察」 is more objective and neutral.
- RelatedサーベイランスFormalFormal loanword for regular monitoring of epidemics, the economy and the like; mostly heard in specialist fields.
- Antonym無視むしNeutralNeutral word meaning to ignore or disregard; the opposite of the careful watching of 「観察」.
Use 「観察」 for closely watching how something looks or what state it is in. Choose 「観測」 for measuring natural phenomena, 「監視」 for continuous watching against trouble, 「観覧」 for enjoying shows or scenery, and 「検分」 for on-site checks.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


