Whisky Blantons Black Japanese Edition. The Blantons Black Japanese Edition is produced exclusively for the Japanese export market with an alcohol level of 80 proof. It is one of the rarest bourbon whiskeys in the world. It is worth noting that it is similar to the Special Reserve Green Label with the only difference being 8 years! It is produced in an aged barrel that is carefully selected to give a complex, full but definitely refined, tasting experience in the end.