Japanese beverage and alcoholic beverage manufacturer Suntory announced that it will increase the retail prices of its premium whiskeys by 20% to 125% from April 1 next year. This is due to the rising popularity of 'highball', a drink mixed with whiskey and carbonated water, which has led to increased demand for Japanese whiskey. As a result, there have been supply shortages, and domestic liquor stores have been selling Japanese whiskey at prices several times higher than the local price.