The best food Japan has ever invented, period. Yes that's right, better than ramen (despite the fact that's actually Chinese), better than daifuku, taiyaki, shabu shabu, okanamiyaki, EVERYTHING!!!1one!.
I present the dessert dish known as Anmitsu! I made it my buisness to sample each prefecture I visited's offering of Anmitsu, and I found that a small cafe near Hikone castle in Shiga offered the best Anmitsu in Japan, and I made a big point in telling the chef too. Freaking awesome sauce.
Wiki: Made of small cubes of agar jelly, a white translucent jelly made from red algae or seaweed. The agar is dissolved with water (or fruit juice such as apple juice) to make the jelly. It is served in a bowl with sweet azuki bean paste or anko (the an part of anmitsu), boiled peas, often gyūhi and a variety of fruits such as peach slices, mikan, pieces of pineapples, and cherries. The anmitsu usually comes with a small pot of sweet black syrup, or mitsu (the mitsu part of anmitsu) which one pours onto the jelly before eating. Anmitsu is usually eaten with a spoon and fork.