TOKYO, Apr 25, 2017 - (JCN Newswire) - Showa Denko ("SDK"; TSE:4004) today submitted its annual securities report for the 108th business term and amended prior-year annual securities reports to Kanto Local Finance Bureau. This is in line with the bureau's extension of deadline to May 1, 2017 as described in our news release of March 29, 2017...