United States, i believe
Japan ended its policy of isolation with the Meiji Restoration in 1868, marking a period of increased engagement with the outside world.
When Japan opened some if its ports to foreign trade their long history of isolation ended. So basically, their isolation (or Japanese isolationism) is what ended.
Matthew Perry ended Japan's Isolation when the US sent him to Japan.
1853
Japanese shore crab was created in 1853.
1639-1663
Japanese barque Kankō Maru was created in 1853.
Anhalt-Dessau ended in 1853.
Anhalt-Köthen ended in 1853.
Tipografia Elvetica ended in 1853.
Cleveland University ended in 1853.
Fredrikshalds Budstikke ended in 1853.