noun
whole area; entire region
Refers to a broad, continuous geographical area as a whole. Often used with place names or in descriptions of regions.
関東一帯に大雨が降った。
Heavy rain fell across the entire Kanto region.
noun, noun which may take the genitive case particle 'no'
Used for a defined stretch of land, often with a specific characteristic (e.g., residential belt, industrial zone). Can be used with 'no' to modify nouns.
この一帯は住宅地になっている。
This stretch of land has become a residential area.
工場が立ち並ぶ一帯の風景。
The scenery of the zone lined with factories.