With the World Exposition in Osaka to be held on an artificial island, concerns have risen over the possibility of visitors becoming stranded if a disaster cuts off all three routes to the venue.Organizers are stockpiling supplies to prepare for a scenario where evacuation from Yumeshima could take up to three days. According to new projections released March 31 for a megaquake in the Nankai Trough, the area where the artificial island is located could experience temblors as strong as upper 6 on the Japanese seismic intensity scale of 7.The Osaka prefectural government estimates that tsunam…READ FULL ARTICLE