In particular, the treaty with Russia, signed on February 7, 1855 established Nagasaki as an open port and, further, granted extraterritoriality privileges to foreigners living in Japan.
These treaties demanded immediate opening of ports, and also established generally unequal trade relationships between the Western powers and Japan.
[5] On that date, the foreign settlement returned fully to Japanese control.
Tariffs returned to Japanese after the treaty with the United States, signed on February 21, 1911.
In the run up to World War II, however, the foreign population of the settlement declined, so that few were left as hostilities broke out.