When we go in, we went in very hard, and we didn't tell anybody about it, because we wanted surprise—Who knows better about surprise than Japan? Why didn't you tell me about Pearl Harbor?
Source, in full
In response to a reporter questioning why the US did not inform its NATO allies before launching strikes on Iran, during a joint press conference with Japanese Prime Minister Sanae Takaichi, quoted in "Trump makes Pearl Harbor joke during meeting with Japanese prime minister" NBC News (March 19, 2026)