A former justice minister and a lawmaker in Japan were arrested on Thursday on suspicion of vote-buying, in a harsh blow to Prime Minister Shinzo Abe as he struggles with falling voter support.Support for Abe, who had close ties to the ex-justice minister, has declined over what critics say is his clumsy handling of the coronavirus pandemic, a furore over efforts to extend top prosecutors’ retirement age, and questions about government programmes to support tourism and smaller companies.Tokyo…