成分|せいぶんseibun[1]atamadaka (head-high)

1. nouningredient; component; composition
   グリーンピースは鉄分てつぶんが豊富ほうふで爪つめの色いろがよくなる成分せいぶんが含ふくまれている。↗

   Green peas are high in iron and contain nutrients that improve the colour of fingernails.

• Synonym要素ようそNeutralAn element or factor, often abstract; 「成分」 leans toward physical or chemical substances.
• SynonymコンポーネントNeutralA loanword for components or parts, mostly in IT and audio equipment; 「成分」 leans toward chemical or nutritional content.
• SynonymエレメントNeutralA loanword for elements, including heating elements; used mainly in technical fields.
• Synonym構成要素こうせいようそWrittenWritten-style term for the elements that make up a whole, often abstract; 「成分」 is about the substances something contains.
• Synonym構成成分こうせいせいぶんWrittenA formal, academic term for the components something is made of; more specialized and less common than 「成分」.
• Related一部いちぶNeutralMeans one part or portion of a whole; 「成分」 refers to the individual components making up a whole, like the substances in a material or parts of a sentence.
• Related材料ざいりょうNeutralRaw materials for making or cooking something; 「成分」 is about the components already contained in something.
• Related素材そざいNeutralRaw material, or subject matter for creative work; 「成分」 is about chemical composition.
• Related一部分いちぶぶんNeutralAlso means one part of a whole, but stresses that it is only a portion more strongly than 「一部」.
• Related食材しょくざいNeutralThe food ingredients themselves used in cooking; 「成分」 is the substances food contains, nutrients and additives included.
• Related部分ぶぶんNeutralA general word for a part or section of something; 「成分」 is about what a substance is made of.

Use 「成分」 for the substances something contains, as in 「成分表示」 or 「有害成分」. For abstract constituent elements pick 「要素」; for raw materials 「材料」 or 「素材」; for cooking ingredients 「食材」; for IT or audio parts 「コンポーネント」. 「部分」 and 「一部」 are just parts of a whole, and 「構成要素」/「構成成分」 are written-style alternatives.

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

1. 集あつまって、あるものを組み立くみたてている物質ぶっしつ。
2. 文章ぶんしょうを構成こうせいするそれぞれの部分ぶぶん。
3. ベクトルや行列ぎょうれつを構成こうせいする数かずや記号きごう。要素ようそ。
4. 北朝鮮きたちょうせんにおける階級かいきゅう。出身しゅっしん成分せいぶん。