原げん因いん究きゅう明めいMeaningsNounSuru verb1. investigation to determine the cause (of); tracing something back to its originKanji used原original因cause究research明brightComposed of原げん因いんcause; origin; sourceNoun究きゅう明めいinvestigation (esp. in academic and scientific contexts); finding out the facts; bringing (a matter) to light; inquiring intoNoun