I think for some years the games may have been down, but these last years Ikiki / Uta has always had a homepage where he hosts his games somewhere. It changes every few years, but by searching for "ikiki" and "himoji" you can mostly find it. Here is the current official page with all his games:
http://ikiki.html.xdomain.jp/himoji/game.htm (
Here is the "yamigame" section. His "canceled" games, I assumed. Some cool ones, still!)
It's all japanese, but the zip files carry the "english" file name. Just hover over the download links to see the name in the URL.
Pro tip: Google translate the txt file in the game folder, they always have a control list in them, or have a look at my videos in the signature.
He also still releases games, although from what I've played there doesn't seem to be anything major like Nikujin or the awesome Teppoman 2.
I think he deserves more attention, as even his weaker games are often very playful. Though, frankly most of his games just aren't good at all, apart from standouts like Nikujin and the awesome Teppoman 2, which did get some recognition.
I once mailed him but never got a response, I guess he just doesn't speak English, at all. If someone around here spoke Japanese and English, and actually called out to him, that would be great. I think there has never been any public contact between Ikiki and his western fans.