Meaning and Usage
"一部分" (いちぶぶん) means "a part" or "a portion" of something larger. It is often used to refer to a segment or fraction of an object, plan, problem, or document.
Common Contexts
You will frequently see "一部分" in formal or written Japanese, especially in business, academic, or technical contexts where something is divided into parts.
Collocations and Patterns
- 一部分だけ (いちぶぶんだけ): only a part; emphasizes partiality
- 一部分に過ぎない (いちぶぶんにすぎない): just a part; downplays the significance
- 計画の一部分 (けいかくのいちぶぶん): a part of a plan
Usage Notes
"一部分" is a noun and can be used with particles like の to modify other nouns. It is more formal than simply saying "部分" and often implies a meaningful segment rather than an arbitrary piece.
Common Mistake
Learners sometimes confuse "一部分" with "一部" (いちぶ), which can also mean "a part" but is often used in different contexts such as "一部の人" (some people). Remember that "一部分" emphasizes the portion aspect more explicitly.