A bottle containing 720ml. It is the most common sake bottle size in Japan and is based on the gō (equivalent to 180ml), a traditional Japanese measuring unit. Historically, this is how rice was measured, and since sake comes from rice, it made sense to base the bottle size on it. Yongōbin = 4 gō (4 x 180ml) bottle. Hence, the 720ml bottle size.
Organic brown rice