How to say "boom" in Japanese

Choosing the right word
  • ブームJLPT N1approx.Common
    noun, noun (suffix)Covers a boom as a craze or fad — something suddenly popular with the public, such as a fashion, hobby, or performer. It refers to trends, not economic conditions.
    小型車こがたしゃのブームは終おわろうとしている。↗
    The small car boom is ending.
  • 盛況せいきょうCommon
    nounCovers a boom as an event's success: being well-attended and flourishing. Use it for concerts, exhibitions, or sales doing brisk business, not for fads or the economy.
    バザーは盛況せいきょうのうちに終おわった。↗
    The bazaar ended a great success.
  • 暴騰ぼうとうCommon
    noun, suru verb, intransitive verbHere 'boom' means a sudden, sharp rise — above all of prices or markets skyrocketing. It is really about a steep surge; avoid it for fads or general prosperity.
    厳きびしい住宅じゅうたく不足ふそくは1つには暴騰ぼうとうした家賃やちんのせいである。↗
    The severe housing shortage is partly to blame for the inflated rents.
  • 好景気こうけいきCommon
    nounCovers a boom as good economic times: a wave of prosperity in business and the economy as a whole. This is the word for an economic boom, as opposed to a craze or price surge.
    市しの産業さんぎょうはみんな好景気こうけいきに沸わいている。↗
    All the industries in the city are booming.
  • 景気けいきJLPT N3approx.Common
    nounMeans economic conditions generally, with 'boom' as one reading — good (economic) times. It is the everyday word for how the economy is doing; use it for the economy rather than for fads or events.

Use 「ブーム」 for a passing craze, 盛況 for a well-attended event, 暴騰 for skyrocketing prices, and 好景気 or 景気 for economic booms, with 景気 the more general economic word.

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

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

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