Kashi are small, hand crafted desserts made from a ingredients including mochi, sweet bean past, and agar. Not the cereal.
Cafe Zaiya is highlighting kashi desserts made by New Matsue Kashi, based in Matsue City.
According to the flyer, "The New Matsue Kashi Project is planning to create a kashi bar in New York. Here people will be able to watch the kashi being handmade by master craftsmen, as well as being able try the kashi. The New Matsue Kashi Project will also be exporting the technique of kashi making." In the meantime, I guess you can get your fill at Zaiya.
They're tiny, artistic, and not cheap, but they're the sort of thing you're going to eat in four or five bites. If you're in the neighborhood, stop by and pick up a couple, or at least drop in to take a look.
Here are some pics: