東部 refers to the eastern region of a country or area, often characterized by its unique geography, culture, and economy. In many contexts, such as in 日本 or 中国, the term highlights the differences between the eastern parts and other regions, showcasing distinct traditions, languages, and lifestyles. In 日本, for example, 東部 includes major cities like 東京 and 横浜, which are known for their bustling urban life and technological advancements. In contrast, the western regions may focus more on agriculture and traditional practices. This diversity contributes to the rich tapestry of the nation's identity.