増える・殖える|ふえるfueru[2]nakadaka (mid-high)

JLPT N4approx.Common
Which spelling to use
増える増える is the more common written form and the recommended choice for beginners; use it when you need to write this verb.
殖える殖える is a less common written variant of 増える; beginners should recognize it as an alternative but generally choose 増える instead.
Definitions
  1. ichidan verb, intransitive verbto increase; to multiply殖える usu. refers to population growth or capital appreciation
    ここの交通量こうつうりょうは増ふえた。↗
    The traffic has built up here.
Conjugation
Dictionary form増える(ふえる)
Polite (masu)増えます(ふえます)
Negative (nai)増えない(ふえない)
polite (masen)増えません(ふえません)
classical zu / nu増えず・増えぬ(ふえず・ふえぬ)
Past (ta)増えた(ふえた)
polite (mashita)増えました(ふえました)
Past negative (nakatta)増えなかった(ふえなかった)
polite (masen deshita)増えませんでした(ふえませんでした)
Te form増えて(ふえて)
Potential増えられる(ふえられる)
Passive増えられる(ふえられる)
Causative増えさせる(ふえさせる)
Causative passive増えさせられる(ふえさせられる)
Conditional (ba)増えれば(ふえれば)
tara増えたら(ふえたら)
Volitional増えよう(ふえよう)
polite (mashou)増えましょう(ふえましょう)
Imperative増えろ(ふえろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Transitive / intransitive pair
intransitive増えるふえる⇄transitive増やすふやす
人数にんずうが増ふえる
人数にんずうを増ふやす
増える focuses on the event or resulting state, as in 人数が増える; 増やす foregrounds an agent acting on something, as in 人数を増やす.

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

Synonyms & antonyms
  • Synonym増加ぞうかWrittenA formal Sino-Japanese word for a rise in quantity, typical of statistics and news, as in 「人口が増加する」; more formal than 「増える」.
  • Synonym増すますWrittenCovers increases in quantity or degree, as in 「人気が増す」; leans toward written style and can also be used transitively, unlike intransitive 「増える」.
  • Synonym増殖ぞうしょくWrittenMultiplication of organisms or cells, as in 「細菌が増殖する」; also figurative for spreading. Not a general stand-in for 「増える」.
  • Synonym増大ぞうだいWrittenAn increase in scale or magnitude, as in 「負担が増大する」; stresses something growing bigger overall rather than a count going up.
  • SynonymアップCasualA loanword abbreviation for a rise or boost, common in advertising, as in 「売上UP」; casual and punchy rather than neutral prose.
  • Related繁殖はんしょくWrittenBreeding and reproduction of living things, as in 「繁殖期」; restricted to organisms, so it cannot replace 「増える」 for numbers in general.
  • Related膨らむふくらむNeutralTo bulge or swell, or for scale to expand, as in 「夢が膨らむ」; looser and more figurative than 「増える」.
  • Related膨張ぼうちょうWrittenExpansion in volume or scale, as in 「都市の膨張」; a written word for things growing bigger, not just more numerous.
  • Related膨れるふくれるCasualTo puff or swell out, but also to sulk and pout, as in 「ふくれっ面」; only the swelling sense touches 「増える」.
  • Related伸びるのびるNeutralUsed for results, scores or sales growing; pictures growth as something extending further, rather than a count of things simply going up.
  • Related拡大かくだいWrittenExpansion of scope or scale, as in 「規模を拡大する」; about area or range widening, not merely numbers increasing.
  • Related発展はってんWrittenDevelopment toward a higher stage, as in 「経済の発展」; about progress and growing strength, not a simple rise in quantity.
  • Related高まるたかまるWrittenFor degrees rising, such as emotions or atmosphere, as in 「期待が高まる」; heightens intensity rather than increasing numbers.
  • Related上がるあがるNeutralFor values rising, as in 「物価が上がる」; stresses moving upward, and the word covers many other senses of going up.
  • Related広がるひろがるNeutralFor ranges spreading out, as in 「噂が広がる」; stresses area and reach expanding rather than numbers growing.
  • Related増進ぞうしんWrittenAn increase in physical strength or ability, as in 「食欲増進」; limited to promoting health, ability and the like.
  • Related増やすふやすNeutralTransitive, for making quantities increase; the intransitive 「増える」 is for numbers growing on their own.
  • Related膨れ上がるふくれあがるCasualTo balloon or swell up hugely, as in 「借金が膨れ上がる」; carries a sense of growth getting out of control.
  • RelatedかさむWrittenFor expenses piling up, as in 「出費がかさむ」; suggests an accumulating burden rather than neutral growth.
  • Antonym減るへるNeutralThe direct antonym: numbers or amounts getting smaller, as in 「体重が減る」.
  • Antonym減少するWrittenThe written, statistics-style antonym: a drop in quantity, as opposed to 「増える」.

For numbers growing on their own, 「増える」 is the everyday default; to make them grow, use the transitive 「増やす」. Formal statistics and news writing prefer 「増加」. Living things multiply with 「増殖」 or 「繁殖」; scale or scope expands with 「拡大」 or 「増大」; runaway growth is 「膨れ上がる」. For a decrease, the antonym is 「減る」 (formal: 「減少する」). The rest overlap only in narrower senses: 「高まる」 for rising degrees, 「上がる」 for rising values, 「広がる」 for spread, 「伸びる」 for sales, 「かさむ」 for costs.

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

Japanese definitions
  1. 数すうや量りょうが多おおくなる。
Kanji in this word
English equivalents
See also

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

Say it right, write it right

Core lookup works fully offline, with cloud pronunciation and one-tap save & review. Free, no sign-up.

Free downloadWindowsFree downloadmacOSDownload on the App StoreGet it on Google Play
MobileiOS / Android

Android

QR code for the Google Play pageGet it on Google Play

Scan it with your Android phone to install, or search for “Tomoshi” on Google Play.

iOS

QR code for the App Store pageDownload on the App Store

Scan it with your iPhone camera to install, or search for “Tomoshi” in the App Store.

Install the browser extensionLook words up on any web page · Chrome / Edge / Safari

Screenshot of a Tomoshi lookup resultScreenshot of Tomoshi lookup results on a phone

Windows macOS Chrome / Edge / Safari extension iOS / Android