Ryojun

Lüshunkou 旅顺口区
District
View of Lüshun's harbor and town from an old Japanese fortification
Lüshunkou Location in Liaoning
Coordinates: 38°51′12″N 121°15′01″E / 38.8534°N 121.2502°E / 38.8534; 121.2502Coordinates: 38°51′12″N 121°15′01″E / 38.8534°N 121.2502°E / 38.8534; 121.2502
Country	China
Province	Liaoning
Sub-provincial city	Dalian
Area
• Total	512.15 km2 (197.74 sq mi)
Population (2010)
• Total	324,773
• Density	630/km2 (1,600/sq mi)
Time zone	China Standard (UTC+8)
Dalian district map	Subdivisions of Dalian, Liaoning 1 2 3 4 5 6 7 8 9 10 Core 1 Zhongshan 2 Xigang 3 Shahekou 4 Ganjingzi Suburban 5 Lüshunkou 6 Jinzhou 9 Pulandian Satellite 8 Wafangdian 10 Zhuanghe Rural 7 Changhai Co.
Division code	210212
Website	dllsk.gov.cn

Lüshunkou District (also Lyushunkou District or Lvshunkou District; simplified Chinese: 旅顺口区; traditional Chinese: 旅順口區; pinyin: Lǚshùnkǒu Qū) is a district of Dalian, in Liaoning province, China. Also called Lüshun City (旅顺市; 旅順市; Lǚshùn Shì) or literally Lüshun Port (旅顺港; 旅順港; Lǚshùn gǎng), it was formerly known as both Port Arthur (亚瑟港; 亞瑟港; Yàsè Gǎng; Russian: Порт-Артур; Port-Artur) and Ryojun (Japanese: 旅順). The district's area is 512.15 square kilometres (197.74 sq mi) and its permanent population as of 2010^[update] is 324,773.

Lüshunkou is located at the extreme southern tip of the Liaodong Peninsula. It has an excellent natural harbor, the possession and control of which became a casus belli of the Russo-Japanese War (1904–05). Japanese and then Soviet administration continued until 1953. During the first decade of that period, it was world-famous and was more significant than the other port on the peninsula, Dalian proper. In Western diplomatic, news, and historical writings, it was known as Port Arthur, and during the period when the Japanese controlled and administered the Liaodong (formerly Liaotung) Peninsula it was called Ryojun (旅順), the Japanese pronunciation of the Chinese characters in the city's name.