一部分(いちぶぶん)

いちぶぶん
noun
a part; a portion; a section
1. a part; a portion; a section
A fraction or segment of a larger whole. More explicit than 一部, emphasizing that the item in question is literally one section of something.
これは全体(ぜんたい)の一部分(いちぶぶん)にすぎない。
This is only a part of the whole.
壁(かべ)の一部分(いちぶぶん)が壊(こわ)れていた。
A section of the wall was broken.
費用(ひよう)の一部分(いちぶぶん)は会社(かいしゃ)が負担(ふたん)してくれるので、自分(じぶん)で払(はら)う金額(きんがく)は少(すく)ない。
The company covers a portion of the cost, so the amount I pay out of pocket is small.

Composed of 一(いち) (one) + 部分(ぶぶん) (part). While 一部(いちぶ) is the more common and shorter synonym, 一部分(いちぶぶん) is slightly more formal and emphasizes the physical or conceptual segment more concretely.

COMMON COLLOCATIONS:

  • 全体(ぜんたい)の一部分(いちぶぶん): a part of the whole
  • ほんの一部分(いちぶぶん): just a small portion
  • 一部分(いちぶぶん)だけ: only a portion
  • 一部分(いちぶぶん)を占(し)める: to make up a portion

SIMILAR WORDS:

  • 一部(いちぶ): a part — more common in everyday speech and writing; often interchangeable
  • 部分(ぶぶん): a part, portion — more general and does not specify "one" section
  • 一端(いったん): one end, a part — emphasizes a glimpse or aspect rather than a physical section
general
Added 2026.4.27 20:13
25500/25727_ichibubun