noun
research investigation; research survey
A formal compound combining 研究 (research) and 調査 (investigation/survey), used in academic, scientific, or institutional contexts for systematic inquiry.
この研究調査は3年かけて行われた。
This research investigation was carried out over three years.
研究調査の結果を学会で発表する。
I will present the results of the research survey at the academic conference.
Compound of 研究 (research) and 調査 (investigation/survey). The exact historical derivation is uncertain, but the spelling is conventionally associated with the combined meaning.