How to say "enthusiastic" in Japanese

Choosing the right word
  • 熱心ねっしんJLPT N4approx.Common
    na-adjective, nounThe most common of these: use it for 'enthusiastic' meaning earnest, sustained dedication — a zealous student or worker who puts real effort into an activity. It describes an enduring attitude rather than a momentary mood.
    この本ほんは彼かれの熱心ねっしんな研究けんきゅうの成果せいかである。↗
    This book is a result of his enthusiastic research.
  • 意欲的いよくてき
    na-adjectiveCovers 'enthusiastic' as keen and motivated — eager to take on tasks or challenges. Typical of evaluations of employees, students or teams whose positive, proactive attitude stands out.
    彼かれの次つぎの制作せいさくは非常ひじょうに意欲的いよくてきなミュージカルだった。↗
    His next production was a very ambitious musical.
  • na-adjective, nounFits 'enthusiastic' only in the sense of visibly excited and hyped up — loud, animated energy of the moment. It describes a mood, not dedication, and can even suggest someone is somewhat overexcited.
  • 情熱的じょうねつてき
    na-adjectiveFor 'enthusiastic' shading into passionate and ardent: intense emotional fervor. Suits a passionate lover, performer or campaigner — someone whose feelings run hot, rather than someone who is simply diligent.
  • 熱っぽいねつっぽい
    i-adjectiveA vivid, less common choice: it pictures enthusiasm as a heated, almost feverish state, as when someone speaks about a subject with visible fervor. It suggests the warmth of the moment rather than settled dedication.

Use 熱心 for earnest dedication to an activity, 意欲的 for motivated eagerness, 情熱的 for passionate intensity, 「ハイテンション」 for hyped, excited energy, and 「熱っぽい」 for fervent, heated enthusiasm.

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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