Moreover, it was originally intended to be classified into two levels to avoid complication, but low-concentrated coffee in bottles came to be included and it was expanded in scope to three classes.
また、複雑化を避けるため当初は2区分にとどめる予定であったが、低濃度の瓶入りコーヒーも対象に含まれることになり3区分へと範囲が拡げられることとなった。