The Japanese government on Monday said it was “regrettable” that a Chinese staffer described the Senkaku Islands in the East China Sea as China’s territory in unscripted remarks on NHK radio, and urged the public broadcaster to prevent a recurrence. Chief Cabinet Secretary Yoshimasa Hayashi said the reporting during NHK’s Chinese-language news program contradicts Japan’s stance that the uninhabited islands are the country’s “inherent territory” based on history and international law. “We urge NHK to be mindful of its social responsibility as a public broadcaster and prevent a recurrence,” Haya…