► 名詞黒幕 [くろまく]
meaning: mastermind rank: 4☆
政界の黒幕 ⇨ The puppetmaster of the political world
(☛ Originally refers to black curtains in theaters)首謀者 [(3)しゅぼうしゃ]
meaning: mastermind rank: 4☆
爆弾テロの首謀者 ⇨ The mastermind of a terrorist bomb attack
(☛ A mastermind of a crime)