With just one month to go until the World Exposition in Osaka opens, predictions of a nearly 3 trillion yen ($20 billion) economic impact are looking shaky as advance ticket sales remain slow and pavilions face delays in completion.A visitor target of 28.2 million for the April 13-Oct. 13 event on the artificial island of Yumeshima in Osaka Bay is the basis for the government's estimate of an economic impact worth 2.92 trillion yen across the country.But advance tickets sold as of March 5 stood at 8.07 million since they went on sale in November 2023, far off the target of 14 million set by…READ FULL ARTICLE