Dont know. But i remember mona was forked from Sakuracoin? So maybe sakuracoin worth to watch also....
The old monacoin that Mr.Watanabe made was the first cryptocurrency in Japan.
However, another man who wanted to become "the first in Japanese cryptocurrency" distributed this coin so that it is not known to other Japanese and Mr. Watanabe, renaming this coin as sakuracoin.
Also, when he distributed sakuracoin, he deleted the copyright of Monacoin. And he said, "I made it."
The Japanese was angry to know that. They think "The Japanese does not do such a shameless thing". So they hate Sakuracoin.
There is no Japanese currently using sakuracoin.
This is the fact.
http://dic.nicovideo.jp/a/sakuracoin