Osaka, Kobe, and Otaru are three cities in Japan. Osaka is the second largest city in Japan with a population of over 2.7 million people. It is known for its vibrant nightlife and shopping districts. Kobe is a port city located on the southern coast of Japan. It is known for its delicious beef and its beautiful harbor. Otaru is a small city located in Hokkaido, the northernmost prefecture of Japan. It is known for its canals, which were built during the Meiji period.