Sakoku was an Isolationist policy held by Japan from 1639 to 1853, the policy removed trade from outside countries and limited heavily access to Japan and Japanese culture. However, some trade still occurred with the Dutch, who also gave updates on the western world. In 1853 Commodore Matthew Perry was sent to Japan with a fleet of US warships. Perry’s goal was to leave from Japan with a signed treaty opening up Japanese trade to the United States of America. The following February Perry returned with an 8 warship strong fleet, within the next month the treaties were signed and Japan left their Sakoku tradition for a peaceful treaty with the US.