Shuseido fuhyo (alcohol hydrometer)

The shuseido fuhyo (alcohol hydrometer) is an instrument used to measure the alcohol content of sake. By measuring the specific gravity of a liquid, it allows the alcohol percentage to be calculated. Commonly known as an "alcohol meter," it is used mainly at sake brewing sites and during tastings. Because it can determine alcohol concentration from changes in the density of the liquid, it is an indispensable tool for accurate quality control. It also plays an important role in understanding the quality and characteristics of sake.