Claim: The Lansing–Ishii Agreement, which was hailed as a landmark in Japan–American relations, was instituted in April 1923.
Evidence: The agreement was abrogated in April 1923, when it was replaced by the Nine-Power Treaty. 
The Lansing–Ishii Agreement (石井・ランシング協定, Ishii-Ranshingu Kyōtei) was a diplomatic note signed between the United States and Japan on 2 November 1917 over their disputes with regards to China.