I don't eat too much Japanese food but I really like their candy. This candy in particular is really good. It's sort of like a gummy bear, but very hard. They put a sour coating on it that will make you almost convulse in pain, but it's a good convulse. These 2 flavors are grape and lemon, and both were super.
In addition to the delicious candy on the inside, there are strange monster illustrations on the outside. They're just slightly too disturbing to be cute, but they almost are. Look at their tails on the backs of the packages. Just look at them!!
It's easiest to buy from a Japanese grocery, but if you don't have one near you there's a website too. It's not in English but apparently you can order from here.
Also check out these other monsters.