Jayaprakash Sittampalam Tissainayagam (known as J. S. Tissainayagam, Tamil: ஜெயப்பிரகாஷ் சிற்றம்பலம் திசைநாயகம்) is a Sri Lankan journalist. He was detained by the Terrorism Investigation Division of the Sri Lanka Police on 7 March 2008. He was held without charge for almost 6 months. He was indicted on politically motivated charges under the draconian Prevention of Terrorism Act for intending to incite communal hatred through writing, and furthering terrorist acts through the collection of money for his publication. On 31 August 2009 he was convicted of the charges by the Colombo High Court and sentenced to 20 years of rigorous imprisonment.