How to say "nerd" in Japanese

• オタクCommon
  noun, noun (suffix)Covers the geek or enthusiast sense: someone deeply absorbed in a hobby such as anime, games, or computers. Colloquial and broadly usable, sometimes self-deprecating but not necessarily hostile.
• 厨ちゅう
  noun, noun (suffix)Mainly derogatory internet slang for an obnoxious troll or immature freak, not a neutral way to call someone a nerd. Seldom the word you want for the ordinary nerd sense.
• ナード
  nounThe direct loanword for nerd, matching the English sense most literally. Less common than オタク, but a safe choice when you specifically want to evoke an Anglo-American 'nerd' image.
• チー牛チーぎゅう
  nounDerogatory internet slang insulting someone as a socially inept nerd or incel. It is an insult, not a neutral descriptor, so avoid it unless you deliberately intend to mock.
• ヲタ
  noun, noun (suffix)A colloquial written abbreviation of オタク with the same enthusiast or geek sense, used especially in fan communities. Less common than the full form and informal in flavor.
  この問題もんだいは、アイドルのエゴとヲタのエゴの衝突しょうとつだ。↗

  This problem is the clash of the idol's and obsessive fan's egos.

Use 「オタク」 for an enthusiast with obsessive hobbies, 「ナード」 as the direct loanword, and avoid the derogatory internet slang 厨 and 「チー牛」 unless deliberately insulting.

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

• おたくotaku
• 厨ちゅう(Internet) troll
• ナードnerd
• チー牛チーぎゅうnerd
• ヲタotaku
• ダサ男ださおuncool man