Some Japanese overseas complain that NHK world, free of charge, is now mostly in English, for they had been enjoying the programs in Japanese, especially the news.
Well, of course, it is very understandable that NHK world is broadcast for the world where English is mostly understood, and not for the Japanese population outside Japan. And, those Japanese can subscribe to NHK Premium channell in Japanese, though it costs you monthly.
Some linguistic balance in the TV shall be thought as reasonable in this issue, for the foreigner would, perhaps, like to see some programs in Japanese, especially those who are learning Japanese.
And, all in all, the cultural relations are, or should be, done by the mutual exchanges from both sides equally, not by unilateral action at all: Languages used also be the same.