Kampai! Sake Sisters: Sake is a traditional alcoholic beverage from Japan and is otherwise known as rice wine. Women were prohibited from entering the many large and small sake breweries dotting Japan for centuries. However, times have changed and women are present on the sake scene today. In several cases, they are integral to the Japanese brewery business. The documentary depicts women who are not only enthusiasts, but also leaving their marks on the evolution of this Japanese mainstay.