The correct answer is option 3: Kobe. Japan`s famous shipbuilding industry is primarily located in Kobe, which is a city in the Hyogo Prefecture of Japan. Kobe has a long history and tradition of shipbuilding, and it is home to several major shipbuilding companies. These companies have established themselves as global leaders in the field and have built a reputation for producing high-quality ships. It is important to note that options 1, 2, and 4 are incorrect. Detroit is a city in the United States known for its automobile industry, Pittsburgh is known for its steel industry, and Las Vegas is primarily known for its tourism and entertainment industry.