|Ohana from Hanasaku Iroha eating rice porridge|
Okayu, in the simplest terms, is rice boiled with a lot of water until it reaches a porridge or soup-like consistency. It can be eaten for other reasons, but usually it's used for the ill. When it's thin in consistency, it's very easy to digest and contains various nutrients-- perfect for people who can't eat anything.
I made rice porridge a long time ago, and it was extremely helpful. Right now, I wish I had some. I haven't been eating very much because eating normal foods is painful for my stomach. Unfortunately, I don't have the ingredients or the energy to make it.
At this point, I'm cutting this entry short, because my fever is going back up again and I'm getting tired.