How to say "homosexuality" in Japanese

• 同性愛どうせいあいCommon
  no-adjectiveThe common, neutral term for homosexuality as a concept, also covering the literal sense 'homosexual love'. Typical of news reports, academic writing and general discussion.
• その気そのけ
  expression, nounA colloquial euphemism, literally 'that inclination', covering interest in the same sex rather than homosexuality as a concept. It is seldom the word you want; at most it surfaces in casual, indirect talk.
• ホモセクシュアリティ
  nounThe katakana rendering of English 'homosexuality', with the same meaning as 同性愛. It is less common, so 同性愛 is normally the choice unless the loanword itself is wanted.

For homosexuality as a concept use 同性愛, the common neutral term; 「ホモセクシュアリティ」 is a less common loanword with the same meaning; 「その気」 is merely a colloquial euphemism for interest in the same sex.

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

• 同性愛どうせいあいhomosexuality
• その気そのけhomosexuality
• ホモセクシュアリティhomosexuality