裏面|うらめんuramen

1. nounback (side); reverse
2. nounB side (of a record)
3. noun, video gamessecret levels; hidden levels; post-game content

• Synonym裏うらNeutralCovers the back or a hidden side and is the most versatile of these words, as in 「裏を返す」; 「裏面」 leans toward the back of paper or records and hidden game levels.
• Synonym裏側うらがわNeutralRefers to the reverse side or the inside story behind something, as in 「事件の裏側」; 「裏面」 stays closer to the physical back face of an object.
• Synonym背面はいめんWrittenIn formal prose, refers to the rear side of an object or a hidden face; 「裏面」 leans toward the reverse of the front.
• SynonymバックCasualColloquial loanword for the back or for backing and support, as in 「バックに付く」; 「裏面」 is about the reverse face of an object.
• Related後ろうしろNeutralPoints to the space behind or the rear, as in 「後ろを振り向く」; 「裏面」 is about the reverse face of an object.
• Related背後はいごWrittenIn formal prose, refers to the space behind or a behind-the-scenes mastermind, as in 「背後関係」; 「裏面」 is about the reverse face of an object.
• Related後方こうほうWrittenA written, somewhat old-fashioned word for the rear; 「裏面」 is about the reverse face of an object.
• Related後部こうぶWrittenIn formal prose, refers to the rear part of a vehicle or ship, as in 「車両後部」; 「裏面」 leans toward the reverse of the front.
• Related裏手うらてNeutralRefers to the back of a building or house, as in 「家の裏手」; 「裏面」 leans toward the reverse of paper and the like.
• Related後ろ側うしろがわNeutralRefers to the back side of something, as in 「建物の後ろ側」; 「裏面」 leans toward the reverse of the front.
• Related後面こうめんWrittenIn formal prose, refers to the rear or back face; 「裏面」 is the term for the reverse as opposed to the front.
• Antonym表面ひょうめんNeutralRefers to the surface or outward appearance of an object; the opposite of 「裏面」 in the front-versus-back sense.
• Antonymオモテ面おもてめんCasualColloquial term for the front of paper or coins and for a game's regular levels; the direct opposite of 「裏面（うらめん）」.
• Antonym表側おもてがわNeutralRefers to the side that faces front or outward; the opposite of 「裏面」 in the front-versus-back sense.

Use 「裏面」 for the back of paper, records and the like or for hidden game content, as in 「用紙の裏面」 and 「裏面ボス」. For a hidden side or aspect pick 「裏」 or 「裏側」, and for what lies behind use 「背後」. The opposites are 「表側」 and 「オモテ面」.

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

1. 視覚しかくの対象たいしょうである面めんと逆側ぎゃくがわ（裏うら）にある面めん。
2. 外部がいぶに知しられていない部分ぶぶん。内幕うちまく。