減少|げんしょうgenshou[0]heiban (flat)

1. suru verb, transitive verb, intransitive verb, no-adjectivedecrease; reduction; decline
   あまりチームに頼たよりすぎると、個人こじんの闘争とうそう本能ほんのうが減少げんしょうするかもしれない。↗

   When you rely on the team too much, it may reduce your individual competitive instincts.

• Synonym低減ていげんWrittenWritten-style; typically for lowering costs, risks or emissions, as in 「コスト低減」. 「減少」 centers on a quantity simply becoming smaller.
• Synonym減るへるNeutralColloquial intransitive verb for becoming less, as in 「体重が減る」; 「減少」 is a noun with a written, statistical flavor.
• Synonym削減さくげんWrittenWritten; cutting budgets, staff and the like, as in 「経費削減」. It stresses the act of cutting, while 「減少」 stresses the resulting drop.
• Synonym減額げんがくWrittenWritten; reducing a sum of money, as in 「給与の減額」; 「減少」 is not limited to amounts.
• Synonym減量げんりょうNeutralReducing an amount or portion, and also losing weight, as in 「減量に成功」; 「減少」 is broader.
• Synonym縮減しゅくげんWrittenWritten; shrinking scale or quantity; 「減少」 centers on a quantity becoming smaller.
• Synonym漸減ぜんげんWrittenWritten; decreasing little by little, as in 「人口が漸減」; 「減少」 says nothing about how fast.
• Synonym軽減けいげんWrittenWritten; lightening burdens or pain, as in 「負担軽減」; 「減少」 centers on quantity.
• Synonym節減せつげんWrittenWritten; economizing on spending, as in 「経費節減」; 「減少」 stresses the resulting drop in quantity.
• Synonym減りへりNeutralColloquial noun for the amount or rate of decrease, as in 「減りが早い」; 「減少」 leans written.
• Synonym減衰げんすいWrittenWritten; a physics term for the attenuation of signals or vibrations; 「減少」 is more general.
• Synonym減殺げんさいWrittenWritten; a weakening of effect or interest; 「減少」 centers on quantity.
• Synonym減ずるげんずるWrittenWritten verb meaning to decrease or subtract; 「減少」 is a noun, used mostly for statistical declines.
• Synonym減損げんそんWrittenWritten, mainly an accounting term for asset impairment or loss; 「減少」 is an ordinary decrease in quantity.
• Synonym減じるげんじるWrittenWritten; the ichidan-verb form of 「減ずる」, meaning to decrease; 「減少」 is a noun.
• Synonym減げんNeutralMostly a suffix, as in 「3割減」「減収」; it rarely stands alone, while 「減少」 is the full word.
• Synonym減数げんすうWrittenWritten; a decrease in number, and also the subtrahend in subtraction; 「減少」 is more general-purpose.
• Related減退げんたいWrittenDecline in vigor, appetite, memory and the like, as in 「食欲減退」; 「減少」 centers on quantity.
• Related縮小しゅくしょうNeutralShrinking in scale or size, as in 「事業縮小」; 「減少」 centers on quantity.
• Related低下ていかNeutralA drop in ability or quality, as in 「視力低下」; 「減少」 centers on quantity.
• Related下落げらくWrittenWritten; a fall in prices or market values, as in 「株価下落」; 「減少」 centers on quantity.
• Related下降かこうNeutralA drop in height or in numerical values, as in 「気温が下降」; 「減少」 centers on quantity.
• Related低落ていらくWrittenWritten; sagging prices or morale; 「減少」 centers on quantity.
• Related減らすへらすNeutralColloquial transitive verb for actively reducing something, as in 「量を減らす」; 「減少」 is a noun with a written flavor.
• Related先細りさきぼそりNeutralDwindling momentum or prospects, as in 「先細りの業界」; 「減少」 is a plain, general decrease.
• Antonym増加ぞうかNeutralAntonym of 「減少」 on the increase-decrease axis; means to increase.
• Antonym増大ぞうだいWrittenWritten antonym; an increase in scale or degree.

Use 「減少」 as the default for quantities becoming smaller, whether natural or deliberate, especially in statistics. In speech prefer 「減る」 (become less) and 「減らす」 (cut down). Use 「削減」 for the act of cutting budgets or staff, 「低下」 for falling ability or quality, 「下落」 for falling prices, and 「減量」 for weight or portions. Terms like 「低減」「軽減」「減額」「漸減」「減衰」 are written-style with narrower objects; 「増加」 and 「増大」 are the antonyms.

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

1. 減へって少すくなくなる（する）こと。
2. 減へる。