NOT since 1993 had a Japanese journalist been investigated in South Korea. But this time it was not classified military intelligence that was allegedly divulged—but hearsay. On October 8th prosecutors charged Tatsuya Kato, until recently the Seoul bureau chief of the Sankei Shimbun, a Japanese right-wing daily, with defaming the South Korean president, Park Geun-hye. Mr Kato is currently banned fr