範囲

The word refers to a boundary or extent, whether it is a physical space or an abstract limit. It is a neutral term used across all registers, from casual conversation to formal academic or legal documents.

When referring to physical space, it describes the area within which something exists or operates. For example, it is used for signal coverage or search areas. When used abstractly, it defines the limits of applicability, such as the scope of a law, a person's responsibility, or the material for an exam.

It is important to distinguish "範囲" from "領域" (ryōiki). While both can be translated as "area" or "domain," "領域" typically refers to a more specialized field of study, a sovereign territory, or a distinct conceptual realm. "範囲" is more general and focuses on the boundary itself.

In daily conversation, the phrase "許容範囲" (kyoyō han'i) is extremely common. It refers to the "acceptable range" or "tolerable limit," often used when deciding if a mistake or a situation is acceptable.