He is the editor-in-chief of Novosti Donbassa, a Donbass news website. In 2013, he launched Donetskaya Pravda, which focuses on investigating public officials. He has also reported on Donetsk for Hromadske.TV and for Radio Free Europe/Radio Liberty's Ukrainian Service. In 2011, Matsuka's apartment was set on fire after he published a series of articles on the embezzlement of public funds. In April 2014, his car was set on fire after he wrote an article titled "Russia's deep ties to Donetsk's Kremlin collaborators.In April 2014, Reporters Without Borders named Matsuka in its list of 100 Information Heroes In December 2014, the Canadian Journalists for Free Expression presented him with its International Press Freedom Award.