The Shanghai Ghetto, formally known as the Restricted Sector for Stateless Refugees, was an area of approximately one square mile (2.6 km2) in the Hongkou district of Japanese-occupied Shanghai. The area included the community around the Ohel Moshe Synagogue. Shanghai was notable for a long period as the only place in the world that unconditionally offered refuge for Jews escaping from the Nazis. After the Japanese occupied all of Shanghai in 1941, the Japanese army forced about 23,000 of the city's Jewish refugees to be restricted or relocated to the Shanghai Ghetto from 1941 to 1945 by the Proclamation Concerning Restriction of Residence and Business of Stateless Refugees. It was one of the poorest and most crowded areas of the city. Local Jewish families and American Jewish charities aided them with shelter, food, and clothing. The Japanese authorities increasingly stepped up restrictions, surrounded the ghetto with barbed wire, and the local Chinese residents, whose living conditions were often as bad, did not leave. By 21 August 1941, the Japanese government closed Shanghai to Jewish immigration.

Shanghai is one of the four direct-administered municipalities of China. The city is located on the southern estuary of the Yangtze River, with the Huangpu River flowing through it. The population of the city proper is the third largest in the world, with around 29.2 million inhabitants in 2023, while the urban area is the most populous in China, with 39.3 million residents. As of 2022, the Greater Shanghai metropolitan area was estimated to produce a gross metropolitan product (nominal) of nearly 13 trillion RMB. Shanghai is one of the world's major centers for finance, business and economics, research, science and technology, manufacturing, transportation, tourism, and culture. The Port of Shanghai is the world's busiest container port.