Kensuke Nishioka, 42, looked different from the other Japanese journalists I encountered in Tokyo during a February trip. Maybe it was the pink hair. “Don’t believe any journalist who says they’re at risk in Japan,” he declared, shrugging off the time, at age 32, when two members of a nationalist group cornered him in his office, broke his ribs, and injured three others in protest against an article he wrote. (Police arrested and charged the attackers.) Or the following year when the Japanese mafia, the yakuza, kidnapped him for a day and threatened him to stop reporting.