How to say "debris" in Japanese

• 瓦礫がれきCommon
  nounThe usual everyday word for debris: rubble and wreckage from collapsed buildings, earthquakes, or demolition. If you mean scattered broken material after destruction, this is the word you want.
  一連いちれんの爆発ばくはつで、その研究けんきゅう施設しせつは瓦礫がれきの山やまと化かした。↗

  A series of blasts reduced the laboratory to ruins.
• デブリ
  nounA loanword covering technical senses of debris, especially in space science (orbital debris) and disaster commentary. Less common than 瓦礫 and rarely used for ordinary rubble.
• 砕片さいへん
  nounRefers to fragments or broken pieces in a more scientific, descriptive register. A marginal choice for everyday 'debris'; it reads as 'fragments' rather than wreckage from a disaster.
• 岩屑がんせつ
  nounCovers detritus and rocky debris, chiefly in geological or landscape description. It means broken rock specifically, so it is seldom the word you want for general rubble or wreckage.
• 廃石はいせき
  nounPrimarily a mining term for waste rock (mullock, tailings), with 'debris' only as a secondary gloss. Seldom the word you want outside mining contexts, where it denotes discarded stone rather than wreckage.

Use 瓦礫 for everyday rubble and wreckage; 「デブリ」 for technical space or disaster contexts; the others are narrow or specialized terms best reserved for geology, mining, or literary description.

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

• 瓦礫がれきrubble
• デブリdebris
• 砕片さいへんdebris
• 岩屑がんせつdetritus
• 廃石はいせきmullock (waste rock from a mine)
• 残骸ざんがいruins