There's one more recipe from that site on steamed chestnut youkan(?). I think that's what it is. I always get my nuts mixed up. :P
This post also contains an apple youkan recipe which sounds interesting to me. I'll have to see if I can find some agar agar at the store and give it a try. It's aimed more towards Western flavours IIRC, and looks to be a nice clean sweet. (This is more for me to be able to track it down again. :P I lost this recipe for a while).
I should look for a recipe to make mochi / daifuku. I haven't made that in ages! ^___^