That leaves a solid 6 percent profit on the table. If anyone who has a Japanese bank account would like to team up to make this happen, let me know. I have bots which can do the trades efficiently and high volume  mtgox and bitstamp accounts (= lowest fee tiers). I also have access to enough capital to make it worth while. Only thing I don't have is a Japanese bank account in the hands of someone I trust. Or do it yourself, I will applaud you and help in any way I can. I agree with joesmoe2012, this needs to be done for the good of the whole system.