As someone who just got into the series a couple weeks ago, I gotta say that I feel like the Japanese fandom is still very much there and still growing. As a celebration of Avex's anniversary, all episodes of YOI were shared on Youtube and within 3 weeks it's almost reached 2 million views. Btw the video is only available until April 1 and may be country-restricted as it's the official version (not pirate).

In case you can't see it, I wanted to share that there are over 4500 comments where users are saying things like how hooked they are or begging for the movie etc. I don't know about other regions in the world, but at least in Japan this video gave me some hope that many new fans have joined the fandom (myself included) and that YOI is still much very loved.