From the way you describe it, I am sure it must be very delicious, in my life I have never eaten it, the closest thing to a rice based sweet, is a typical one in Venezuela that is known as Rice pudding, and I can assure you that it is very good.

But well I still have the hope of trying it someday, I just have to locate a Japanese community, I know that the state where I live, there is not, but in the capital it is possible that if.