(in alphabetical order)
Hirooka-Shoten
Hirooka-shoten is an old-established sake-store in Kobe, the oldest and most beautiful port town.
They are selling sake in not only real store but also net-shop.
Takimoto
Takimoto is a very large liquor store whom deals in huge line-up products not only Japanese-sake but also wine.
You can find the store along Kyoto-Rokujyo street.