Japan's Prime Minister Shigeru Ishiba recently confirmed the deal, and the country's chief trade negotiator earlier said in a Facebook post that he had visited the White House, adding the hashtag "Mission accomplished".

By Tim Kelly, Satoshi Sugiyama and Leika Kihara TOKYO (Reuters) -Japanese Prime Minister Shigeru Ishiba plans to step down following a bruising upper house election defeat, a source told Reuters, as the embattled premier announced a long-sought trade deal with U.