極ごく秘ひ事じ項こうじ字FuriganaAudioMeanings1nountop secret matter; closely-guarded secretRefers to a matter or piece of information that is kept strictly confidential, often in official or organizational contexts.その文ぶん書しょは極ごく秘ひ事じ項こうとして扱あつかわれている。Break this sentence down in the analyzerThe document is treated as a top secret matter.極ごく秘ひ事じ項こうが外がい部ぶに漏もれた。Break this sentence down in the analyzerA closely-guarded secret was leaked to the outside.