TOKYO — It was an unexpected act of protest that shook Japan’s carefully managed media world: Shigeaki Koga, a regular television commentator and fierce critic of the political establishment, abruptly departed from the scripted conversation during a live TV news program to announce that this would be his last day on the show because, as he put it, network executives had succumbed to political pressure for his removal.
“I have suffered intense bashing by the prime minister’s office,” Mr. Koga told his visibly flabbergasted host late last month, saying he had been removed as commentator because of critical statements he had made about Prime Minister Shinzo Abe. Later in the program, Mr. Koga held up a sign that read “I am not Abe,” a play on the slogan of solidarity for journalists slain in January at a French satirical newspaper.