Monacoin is Japan's first digital currency. Monacoin can easily be overlooked as a serious coin, simply because is is based on an Internet meme of a cat made out of ASCII characters. Even on the inside the source code, there doesn't seem to be any innovative develpment.
On the other side, never underestimate the Japanese fandom, otaku culture. Remember, "Hello Kitty" started off as a Japanese fad and was exported to become a household staple for school girls all around the world.
Also, if we take a closer look at the source code, we find that there may not be any original, ground breaking development there, but it does contain all of the functionality for becoming part of the network of financial systems of the future.