They spoke at a news conference after Minister of Internal Affairs and Communications Sanae Takaichi warned broadcasters last month that their licenses could be revoked if they failed to be impartial in political coverage.
Japan's broadcast law says programs must be "politically fair," and Takaichi said several times in parliament that a station that repeatedly fails in this regard could have its license revoked. Despite multiple protests that her comments constituted a threat to freedom of the press, she has not backed down.
The journalists said both Takaichi's comments and the government response have been unacceptable, and vowed to continue their protest.
Abe's government has been criticized as being too sensitive to critical reporting. Media experts say mainstream media have been shunning critical reporting to avoid trouble with officials who are increasingly touchy about how Japan and government policies are portrayed by both domestic and foreign media.
"Of all ruling Liberal Democratic Party governments, the Abe administration is most nervously checking what the media say, because what's said on television affects his support ratings," said Shuntaro Torigoe, a former Mainichi newspaper journalist and news anchor on TV Asahi.
The journalists also said media outlets haven't fought hard enough for press freedom.
"It's not so much about political pressure, it's about deterioration in the media," said Soichiro Tahara, one of Japan's most respected journalists, who is known for asking tough questions to politicians. "To me, the most serious problem is self-restraint by higher-ups at broadcast stations."
The resignation of three outspoken newscasters this month has prompted further speculation of interference from the government as it attempts to build public support for contentious policies, such as a broadening of Japan's military role and a revision of the war-renouncing constitution.