President Donald Trump was mocked on social media after he apparently forgot the name of a world leader and referred to them as “Mr. Japan” during an interview.

Trump made the remark while talking about the end of his 90-day deadline to hash out deals with other countries to avoid harsh tariffs.

“I’m going to send letters, that’s the end of the trade deal. I could send one to Japan,” Trump told Fox News’ Maria Bartiromo during an interview on “Sunday Morning Futures” that was taped Friday and aired Sunday.

“Dear Mr. Japan, here’s the story: you’re going to pay a 25% tariff on your cars, you know? So we give Japan no cars. They won’t take our cars,” Trump told Bartiromo.

Trump had played down the deadline at a White House news conference Friday by noting how difficult it would be to work out separate deals with each nation. The administration had set a goal of reaching 90 trade deals in 90 days, the Associated Press reported.

Negotiations continue, but “there’s 200 countries, you can’t talk to all of them,” he said in the interview.

Trump was ridiculed for apparently not knowing the name of Japanese Prime Minister Shigeru Ishiba.

“Dear Mr Japan? Trump doesn’t know what or who he is talking about,” tweeted Barbara Comstock, a former Republican congresswoman from Virginia who has been critical of the president.

Another X user added the rolling on the floor laughing and clown emojis to mock Trump’s remarks.

“‘Dear Mr Japan’ Trump’s mind has completely gone. Time to get him committed,” the user wrote.

Another commented with other Trumpisms:

A fourth said Trump’s gaffe was “dangerously embarrassing”:

A fifth X account said that Trump did not just display ignorance of foreign affairs, but car manufacturing as well.

“This truly demonstrates trump’s ignorance,” the account wrote. “First, there is not a ‘Mr. Japan’. Next the majority of the Japanese cars, for American consumption are made in America.

The Associated Press contributed to this report.