The black ship incident refers to 1853, when the United States threatened Japan to open the door with gunboats. In the sixth year of Yongjia (1853), Brigadier General matthew perry (also translated as "Perry") led a fleet into the Puhe Sea in Edo Bay. Finally, the two sides signed the Japan-US Intimacy Treaty (1854) the following year.

Japan was forced to agree to open two ports, Shimoda and Hakodate (now Hakodate), where American ships can add coal and water and get food and other supplies. The treaty also allows the United States to station consulates in the above two ports and enjoy most-favored-nation treatment. Perry became the pride of Yokosuga.

The Japanese not only set up Perry Park in Yokosuga, but also set up a monument at 190 1 where the American black ship landed, with the inscription of Japanese Prime Minister Ito Bowen, "Admiral Peili of the United States of North America landed at the monument".