How to say "hacker" in Japanese

• ハッカーCommon
  nounThe standard loanword for 'hacker', covering skilled programmers and, commonly, people who break into computer systems. Use this in most contexts, from news reports about security breaches to talk of skilled coding.
  今日きょうこの番組ばんぐみでハッカーの問題もんだいをクローズアップするんだって。↗

  This program is going to focus on computer hacking issues today.
• コンピュータマニア
  nounA less common word meaning a computer buff or enthusiast, someone obsessively devoted to computers. It lacks the intruder nuance of ハッカー, so it is seldom the word you want for 'hacker' in the security sense.

Use 「ハッカー」 for the normal sense of 'hacker' (especially computer intruder); 「コンピュータマニア」 is a less common, broader word for an obsessive computer enthusiast rather than a hacker proper.

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

• ハッカーhacker
• コンピュータマニアhacker