A spokesman from the Seoul Central District Court said today that Tatsuya Kato of Japan's Sankei Shimbun was present in court as his lawyers and prosecutors introduced evidence.
The indictment has raised questions about South Korea's press freedom. Critics accuse South Korean President Park Geun-hye's conservative government of clamping down on journalists in an attempt to control her image.
Prosecutors indicted Kato in October over his Aug. 3 article about Park's whereabouts on the day the Sewol ferry sank and killed more than 300 passengers, mostly teenagers on a school trip.
Park's office has denied that she was with the former aide.
Following Kato's indictment, Japan's Foreign Ministry called in diplomat Kim Won-jin from the South Korean embassy in Japan to protest the prosecutors' move.
Kato, who has been banned from leaving the country, pleaded not guilty to the charges and his lawyers claimed in court that the article was in the public interest, according to court spokesman Kim Dae-hyun. The next court date was set for December 15, Kim said.
Moon Jae-in, an opposition lawmaker who was Park's main rival in the 2012 presidential elections, told reporters on Tuesday that the prosecution's decision to indict Kato was an "embarrassment."
"Even if media outlets publish stories that are untrue or make arguments that are hard to agree with, it is important to allow the stories to be debated, criticised and naturally perish within the realm of the media," Moon said.
