一帯|いったいittai[0]heiban (flat)

1. nounwhole area; whole region
   雨あめがあたり一帯いったいに降ふっている。↗

   The rain is raining all around.
2. no-adjectivestretch (of land); tract; belt; zone

• Synonym区域くいきNeutralA demarcated zone, often an administrative one, as in 「立入禁止区域」. 「一帯」 does not imply drawn boundaries.
• Synonym地域ちいきNeutralA stretch of land defined by terrain, economy, culture, etc.; can also mean the local community. 「一帯」 stresses the whole extent of the place.
• RelatedエリアNeutralLoanword for an area or range, common in business and service contexts like 「サービスエリア」. 「一帯」 covers one large, unbroken stretch of land.
• Related地方ちほうNeutralRegions a country is divided into; also the provinces or countryside away from the capital. 「一帯」 refers to the whole extent of one particular area.
• Related地帯ちたいNeutralAn area defined by a shared feature, as in 「工業地帯」 or 「危険地帯」. 「一帯」 stresses extent, not any characteristic of the land.
• RelatedリージョンNeutralLoanword for a region, mostly in games and IT for a server's location. In everyday speech 「地域」 or 「地区」 is the natural choice.

Use 「一帯」 for one large, continuous stretch, as in 「この辺り一帯」 or 「沿岸一帯」. Pick 「地帯」 for belts defined by a shared feature, 「区域」 for zones with drawn boundaries, and 「地域」 for areas in general; エリア, 地方 and リージョン cover other senses of 'area'.

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

1. ある地域ちいきの全体ぜんたい。
2. 一続ひとつづき。