What act of u. s. expansion was the direct result of matthew perry's naval journey to japan ?

The US took possession of of the Midway Islands.

Explanation:

Matthew Perry was a US Commodore who led a formation of American warships to Japan hoping to establish an open trade relationship between the two countries. Since Japan was deeply delayed on technology development, the negotiation achieved a peace treaty for open trade. This event was a significant precedent in America's expansion. By 1867, the US had come to possess the Midway Islands, and later treaties (1875 and 1887) developed trade with the Hawaiian Islands and obtained approval to construct a naval base in Pearl Harbor.

judicial because its legislative, executive and judicial