Otaru is a city and port in Shiribeshi, Hokkaido, Japan, northwest of Sapporo. The city faces the Ishikari Bay, and has long served as the main port of the bay. With its many historical buildings, Otaru is a popular tourist destination. Because it is a 25-minute drive from Sapporo, it has recently grown as a bedroom community. Otaru is a port town on the coast of the Sea of Japan in northern Shiribeshi Subprefecture. The southern portion of the city is characterized by the steep slopes of various mountains, notably Tenguyama; and the altitude of the land sharply drops from the mountains to the sea. The land available between the coast and mountains has been almost completely developed, and the developed part of the city on the mountain slopes is called Saka-no-machi, or "Hill town", including hills named Funamizaka (Boat-view Hill) and Jigokuzaka (Hell Hill).