Negotiations to create a new Japan-U.S. trade agreement could be the defining policy action for both countries in 2019. The project, launched by Prime Minister Abe and President Trump, can’t start until 90 days after Congress have been informed of the plan. That needs to include detailed negotiating positions 30 days before the talks start. The initial negotiations will focus on reducing tariffs. On the basis of WTO duties, Americans paid $2.9 billion of tariffs on Japanese exports while $1.2 billion was paid by Japanese buyers of American products in the 12 months to July 31. That equat...