Answer:
The Preamble reflects the influence of the United States after World War II.
Step-by-step explanation:
This excerpt talks about how Japan wants to continue peaceful and fruitful cooperation with states in order to avoid the horrors that happened, which refers to the atomic bombs which were thrown on Hiroshima and Nagasaki by the United States.
In that sense, the US had influenced Japan and the establishment of their foreign policy which they shall follow after World War II.