減少
減少する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 減少する | 減少しない |
| Polite | 減少します | 減少しません |
| Past polite | 減少しました | 減少しませんでした |
| Past | 減少した | 減少しなかった |
| Te-form | 減少して | 減少しないで |
| Desire | 減少したい | 減少したくない |
| Potential | 減少できる | 減少できない |
| Passive | 減少される | 減少されない |
| Causative | 減少させる | 減少させない |
| Causative passive | 減少させられる | 減少させられない |
| Volitional | 減少しよう | |
| Polite volitional | 減少しましょう | |
| Imperative | 減少しろ | 減少するな |
| Conditional | 減少すれば | 減少しなければ |
| Tara conditional | 減少したら | 減少しなかったら |
Meanings
noun, noun or participle which takes 'suru', transitive verb, intransitive verb, noun which may take the genitive case particle 'no'
Used for numbers, amounts, population, sales, risk, and similar measurable things going down. 減少する can be intransitive, as in 人口が減少する, and also transitive in more formal contexts, as in コストを減少する; 減少の is used before nouns such as 減少傾向.
Antonyms: 増加
The population in this region is decreasing year by year.
The company needs to reduce unnecessary costs.
The decline in sales has become a major problem.
Usage patterns
- 〈数〉が減少するfor a number/amount to decrease
The young population in this area is decreasing.
- 〈数〉を減少させるto cause a number/amount to decrease
The new technology reduced costs.
- 〈物〉の減少a decrease in something
The decline in sales has continued.
- 減少傾向にあるto be on a downward trend
The birth rate is on a declining trend.
- 大幅に減少するto decrease sharply
The number of tourists decreased sharply.