Final answer:
Commodore Matthew C. Perry brought more ships to Japan in 1854 to intimidate the Japanese into negotiating for trade and open relations. This larger fleet showcased the military power of the United States and likely influenced the Japanese decision to enter negotiations.
Step-by-step explanation:
Commodore Matthew C. Perry returned to Japan in 1854 with a larger fleet than he had in 1853 to convince the Japanese to negotiate for trade and open relations. By bringing more ships, Perry aimed to intimidate the Japanese into agreeing to the Treaty of Kanagawa, which opened two Japanese ports to the West, established a U.S. consulate in Japan, and promised humane treatment and return of shipwrecked American sailors. The larger fleet also demonstrated the military power and determination of the United States, which likely influenced the Japanese to enter negotiations.