Otaru (小樽市, Otaru-shi) 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.

As of 31 July, 2011, the city has an estimated population of 131,706 with 67,308 households and a population density of 541.71 persons per km² (1,403.0 persons per sq. mi.). The total area is 243.13 km² (93.87 sq mi). Although it is the largest city in Shiribeshi Subprefecture, the subprefecture's capital is the more centrally located Kutchan.

The city was an Ainu habitation, and the name "Otaru" is recognised as being of Ainu origin, possibly meaning "River running through the sandy beach". The very small remaining part of the Temiya Cave contains carvings from the Zoku-Jōmon period of Ainu history, around A.D. 400. Otaru was recognised as a village by the bakufu in 1865, and in 1880 the first railway line in Hokkaido was opened with daily service between Otaru and Sapporo.

An Imperial decree in July 1899 established Otaru as an open port for trading with the United States and the United Kingdom.

The city flourished well as the financial and business center in Hokkaido as well as the trade port with Japanese ruled southern Sakhalin until the 1920s. Otaru was redesignated as a city on August 1, 1922.

On December 26, 1924, a freight train loaded with 600 cases of dynamite exploded in Temiya Station, damaging the warehouse, the harbour facilities and the surrounding area. Local officials stated that at least 94 were killed and 200 injured in this disaster.

Since the 1950s, as the coal industry around the city went into a decline, the status of economic hub shifted from Otaru to Sapporo.

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).

Neighboring cities and towns

• Shiribeshi
  • Yoichi District: Yoichi, Akaigawa
• Ishikari
  • Sapporo (Teine-ku, Minami-ku), Ishikari

Rivers

Some of the rivers in Otaru are: Hoshioki, Kiraichi, Zenibako, Hariusu, Asari, Katsunai, Shioya, Myoken, Irifune.

In the summer the weather, like all of western Hokkaido, is very warm and balmy, with a maximum temperature of around 25 °C (77 °F) and high humidity - not as hot as southern Japan. In the winter, however, Otaru is very snowy, receiving as much as 6.6 metres (260 in) of snow from November to March, when it snows almost constantly and sunshine levels are extremely low. The average maximum snow cover is 1.22 metres (48 in). Extreme temperatures have ranged from 34.9 °C (94.8 °F) on August 1, 2000 to −18.0 °C (−0.4 °F) on January 24, 1954, in which month the highest snowfall of 3.1 metres (122 in) occurred. Monthly precipitation totals in a record dating back to 1943 have ranged from 379.8 millimetres (15.0 in) in August 1962 to 12.0 millimetres (0.5 in) in June 2007.