South Korea's card spending on Japanese brands has halved. According to data from 8 major card companies, spending on such items during the last week of June was 8-point-4 million U.S. dollars, but that shrank to about 4 million during the last week of July.Amid the widening boycott of Japanese products, brands like ABC Mart and DHC were affected, and Uniqlo saw its sales plunge 70%.This comes despite overall card spending actually increasing during that period.Card spending at four major Japanese tourist destinations including Tokyo and Osaka also decreased by a fifth.