How to say "substantial" in Japanese

Choosing the right word
  • 実質的じっしつてきCommon
    na-adjectiveCovers the sense of substantial as real or actual rather than merely nominal or formal, such as substantial gains or a substantial change. It contrasts appearance with what truly holds.
    これは実質的じっしつてきにはそれよりも高たかくはない。↗
    This is in effect less expensive than that.
  • 本質的ほんしつてきCommon
    na-adjectiveCovers substantial in the sense of essential or intrinsic, pointing to the core of a matter. Use it when something matters at a fundamental level, not merely in appearance or degree.
    いかなる政党せいとうも本質的ほんしつてきに保守的ほしゅてきである。↗
    Any political party is conservative in itself.
  • 大幅おおはばJLPT N1approx.Common
    na-adjective, nounCovers substantial as large in amount or degree, as in a substantial rise or cut. It fits changes in figures, prices, or quantities, not physical bulk or weight.
    この政策せいさくで物価ぶっかは大幅おおはばに値上ねあがりした。↗
    This policy resulted in a great rise in prices.
  • 重厚じゅうこうCommon
    na-adjective, nounDescribes things that are profound, solid, or weighty in character, such as a grave manner or a dignified, imposing style. It is a marginal choice for substantial and suits people or works rather than amounts.
  • 具体的ぐたいてきCommon
    na-adjectiveCovers substantial in the sense of concrete, definite, or material, as opposed to vague or abstract. Use it for plans, proposals, or evidence that is specific and tangible.
    その警告けいこくはわかりやすいし具体的ぐたいてきだ。↗
    The warnings are clear and concrete.

Use 実質的 for real-as-opposed-to-nominal, 本質的 for essential or intrinsic matters, 大幅 for large changes in degree, 重厚 for solid, weighty character, and 具体的 for concrete, definite detail.

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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