TOKYO – Authorities in Japan urged people to avoid hoarding as anxiety over a possible megaquake triggered a spike Saturday in demand for disaster kits and daily necessities.In its first such advisory, the weather agency said a huge earthquake was more likely in the aftermath of a magnitude 7.1 jolt in the south on Thursday which left 14 people injured. At a Tokyo supermarket on Saturday, a sign was put up apologising to customers for shortages of certain products it attributed to “quake-related media reports”. “Potential sales restrictions are on the way”, the sign said, adding…