How to say "treatise" in Japanese

• 論文ろんぶんJLPT N3approx.Common
  nounThe common word for a treatise as a written work that argues or examines a subject — a thesis, dissertation, or scholarly paper; this is what you will usually want.
  彼かれはその問題もんだいについて論文ろんぶんを書かいた。↗

  He wrote a paper on the subject.
• 全書ぜんしょ
  nounSeldom the word you want for 'treatise': it really means a complete book or complete set of books, and appears chiefly in the titles of book series.
• 専門書せんもんしょ
  nounA treatise understood as a book-length work on a specialized or technical subject, written for specialists rather than general readers; the emphasis falls on the book's specialized character, not its argument.
• 学術論文がくじゅつろんぶん
  nounA paper or treatise in explicitly scholarly, academic settings — the kind of writing published in academic journals; it adds an overtone of formal scholarship to 論文.

For 'treatise' as an argued scholarly paper, 論文 is the usual choice; 学術論文 stresses formal academic writing; 専門書 suits a book-length specialized work; 全書 is marginal here and mainly means a complete set of books.

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

• 論文ろんぶんthesis
• 全書ぜんしょcomplete book
• 専門書せんもんしょtechnical book
• 学術論文がくじゅつろんぶんacademic paper
• 論ろんessay