research subject; study topic; laboratory subject
Refers to a specific topic or subject chosen for research, investigation, or laboratory work. Often used in academic or scientific contexts.
His research subject is the effects of environmental pollution.
I plan to propose a new study topic at the next meeting.
研究テーマ is a more common and slightly broader term for a research theme or topic, while 研究題目 is more formal and often used for specific, named subjects in academic settings.
Compound of 研究 (research) and 題目 (subject, title). The exact historical derivation is uncertain, but the meaning is transparent from its components.