内幕|うちまくuchimaku[0]heiban (flat)

1. nounlowdown; inside information; hidden circumstances; inside facts; inner workings; undisclosed circumstances
   彼かれは内幕うちまくをばらすといっていますよ。↗

   He says he'll blow the story open.
2. nouninner curtain (in a military encampment)

• Synonym内部情報NeutralInformation held within an organization; a neutral, descriptive term that leans toward business and legal contexts, as in insider trading.
• Antonym表向きおもてむきNeutralAntonym: the outward or nominal side of things; contrasts with 「内幕」, the hidden circumstances outsiders cannot see.
• Antonym表面ひょうめんNeutralAntonym: the surface or exterior, what is visible from outside; contrasts with 「内幕」 hidden away inside.

Use 「内幕」 for hidden true circumstances outsiders cannot see, as in 「政界の内幕」「内幕を暴く」. For the outward, official side pick 「表向き」 or 「表面」; for information held inside an organization, 「内部情報」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （うちまく）陣地じんちで外そと幕まくの内側うちがわに張はった幕まく。
2. （うちまく、ないまく）語義ごぎ1より転てんじて、外そとから見みえない内部ないぶの事情じじょう。