- Ube City is a city located in Yamaguchi Prefecture, Japan. It is situated on the Seto Inland Sea and has a population of approximately 170,000 residents. Ube City is known for its industrial development, particularly in the chemical and steel industries. The city is also home to several attractions, including Ube Museum of Art, Ube Tokiwa Park, and Tokiwa Park Zoo. Additionally, Ube City is famous for its production of a purple yam called "ube," which has become a popular flavor in various culinary dishes and snacks.