Question: When was the peace treaty with japan signed?
Disambiguated questions and answers: question: When was the peace treaty of San Francisco with japan signed?
When was the peace treaty with japan and korea signed?
When was the taipei peace treaty  with japan signed?
answer: September 8, 1951
June 22, 1965
April 28,1952
Natural Questions answer: September 8 , 1951 (from the Wikipedia article "Treaty of San Francisco")