Answer:
The Japanese government accepted the letter Perry brought from President Fillmore in 1853 because Japan was considering expanding its trading relationships. At the time, Japan was a closed society that did not have much contact with the outside world. However, the government was beginning to recognize the value of trade and was looking for ways to expand its economic relationships with other countries. Perry's letter from President Fillmore presented an opportunity for Japan to establish a trading relationship with the United States, which was a powerful and influential country. Therefore, the government accepted the letter and began negotiations with Perry, ultimately leading to the signing of the Treaty of Kanagawa in 1854.