Good sites for free constant streaming Japanese?

I can find Japanese on the Internet, but either it's on Youtube videos where I have to keep looking for new videos or risk the auto-play selecting a video in another language when I'm not controlling it, or I'll find a site that has a "Japanese" station but it will have intermittent English segments for their Western listeners.

I'm looking for something that's at a decent difficulty level and that I can just leave on without too much maintenance for a constant immersion experience.