Mizuwari is a Japanese combination of shōchū and cold water. The original version was made with shōchū, but modern variations commonly use Japanese whisky or other spirits. To make the drink, a highball glass is filled with ice before adding water and shōchū or whisky.
Ice can be left out if preferred. The ratio of water and spirits can vary, depending on preference and the type of spirit, but the most common option is one part spirit to two parts water. Mizuwari became popular in the 1970s, and though it is still common, Japanese highball is a more popular option nowadays.