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 |
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.
The young population in this area is decreasing.
The new technology reduced costs.
The decline in sales has continued.
The birth rate is on a declining trend.
The number of tourists decreased sharply.
減少 is the fuller, more formal word for 'decrease' used as a stand-alone suru-verb or noun, while 減 is a terse suffix or shorthand noun typically attached to figures or other nouns.
減少 describes a general decrease in number or quantity, while 低減 emphasizes lowering a level, degree, or burden, often through deliberate effort.
減少 is a general word for any decrease in number or amount, while 目減り specifically describes a gradual loss of quantity, weight, or value, often through storage, transport, or inflation.
減量 is used for reducing a specific measurable quantity like weight or dosage, while 減少 is the more general word for any decrease, such as in population or sales.
減少 describes a numerical decrease in quantity or amount, while 減退 describes a decline in intensity or abstract vitality such as appetite or motivation.
減少 simply means a numerical decrease, whereas 衰退 implies a loss of vigor, prosperity, or influence beyond just numbers.
減少 is a general term for a decrease of any size, whereas 半減 specifies that the decrease is by exactly half.
減少 is a general term for any decrease in quantity or number, while 減額 is specifically about reducing a sum of money.
減少 means a decrease or decline, the direct opposite of 増大's increase or growth.
減少 means only 'decrease,' while 増減 covers both the increase and the decrease of a quantity.
reduced demand; decline in demand
leukopenia; leucopenia