後ろ・後|うしろushiro[0]heiban (flat)

1. no-adjectiveback; behind; rear
   後うしろを刈り上かりあげてください。↗

   I want it tapered in the back.

• Synonym背後はいごWrittenWritten/formal prose. For the direction behind someone or behind-the-scenes senses, as in 「背後から声をかける」 and 「背後関係」; often carries a hidden nuance.
• Synonym後方こうほうFormalFormal. A broader rear area, as in 「後方支援」 and 「車の後方」; used in formal descriptions, military and traffic contexts.
• Synonym後部こうぶWrittenWritten/formal prose. The rear part of the object itself, as in 「車両後部」; 「後ろ」 can also mean the space behind an object.
• Synonym背面はいめんWrittenWritten/formal prose. The back face of an object, as in 「背面に記載」; focuses on the flat reverse surface rather than the area behind.
• SynonymバックCasualColloquial loanword. Back, background or backing, as in 「バックミラー」; also reversing a car, and often used in compounds.
• SynonymリアCasualColloquial loanword. The rear of a car or other vehicle, also in compounds like 「リアスピーカー」.
• Synonym後尾こうびWrittenWritten/formal prose. The last part of a line or convoy, or the tail of a ship or plane, as in 「列の後尾につく」.
• Synonym後背こうはいWrittenWritten/formal prose. Mostly a prefix meaning behind, as in 「後背地」; not used on its own in everyday speech.
• Related背中せなかNeutralNeutral. The back of a person or animal, or the back-like part of an object; 「後ろ」 refers to direction or position.
• Related裏面りめんWrittenWritten/formal prose. The reverse side or the hidden inside story, as in 「写真の裏面」 and 「裏面工作」; about the reverse face, not the area behind.
• Related裏うらNeutralNeutral. The reverse of the front or a side you cannot see, as in 「紙の裏」 and 「家の裏」; stresses the reverse side or hidden spots.
• Related裏側うらがわNeutralNeutral. The reverse side of an object or the inside story of an affair, as in 「月の裏側」; stresses the other side.
• Related裏手うらてNeutralNeutral. The area behind a building or similar, as in 「店の裏手」; limited to buildings and places.
• Related後列こうれつWrittenWritten/formal prose. The back row of people or things lined up, as in 「後列の人」; only for rows.
• Related背部はいぶWrittenWritten/formal prose. The back of the body, mostly in medical explanations; in daily conversation say 「背中」.
• Related後面こうめんWrittenWritten/formal prose. The rear of an object; rare in daily use — say 「後ろ」.
• Antonym先さきNeutralNeutral antonym. The front or the point ahead, as in 「列の先」; the opposite of 「後ろ」.
• Antonym前まえNeutralSame word as above, also written 「前」: the antonym of 「後ろ」, meaning the front or ahead, as in 「列の先」.

For 'behind' or 'the back' in general, use 「後ろ」. In formal writing pick 「後方」 for a rear area, 「後部」 for the rear part of an object, and 「背面」 for a back surface. Use 「裏」 or 「裏側」 for a reverse side, 「裏手」 for the back of a building, and 「背後」 for behind-the-scenes. Colloquial 「バック」 and 「リア」 appear in compounds; 「背中」 is the body's back; 「先」 is the antonym meaning the front.

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

1. （うしろ）（「後うしろ」とも表記ひょうき）位置いちの呼称こしょう。背せの方向ほうこう。
2. （あと、のち）時間じかんの呼称こしょう。ある時点じてんに対たいして未来みらいとなる時点じてん。