TOKYO, Dec 19, 2018 - (JCN Newswire) - Showa Denko (SDK; TSE:4004) hereby announces that pursuant to Article 156 and Article 165, Paragraph 3 of the Companies Act of Japan, SDK has repurchased its own shares, as outlined below and has completed the repurchase in accordance with the resolutions of its Board of Directors' meeting held on December...