1. black curtain
2. wirepuller; mastermind; backroom manipulator; éminence grise; power broker
Wikipedia definition
3. Éminence griseAn éminence grise (French for "grey eminence") is a powerful decision-maker or advisor who operates "behind the scenes" or in a non-public or unofficial capacity. This phrase originally referred to François Leclerc du Tremblay, the right-hand man of Cardinal Richelieu. Leclerc was a Capuchin friar who was renowned for his beige robe attire (as beige was termed "grey" in that era. ) The title "His Eminence" is used to address or reference a Cardinal in the Roman Catholic Church.
Read “Éminence grise” on English Wikipedia
Read “黒幕” on Japanese Wikipedia
Read “Éminence grise” on DBpedia


to talk about this word.