South Korean social media has been awash with calls for a boycott of Japanese goods ever since Tokyo announced a curb on exports of hi-tech materials to its East Asian neighbour earlier this month.On Thursday, “boycott” remained the top tending keyword on Twitter in South Korea, with hashtags like #BoycottJapan calling on the nation’s consumers to stop buying Japanese-made products and engaging with Japanese brands.A survey of 501 people carried out by Korean research firm Realmeter on July 11…