Hy's sugar-free fermented milk 'Yakuruto XO' exceeded 2 million in cumulative sales within a month of its launch. Initially selling 40,000 units per day, sales have now doubled to over 80,000 units daily. Despite misconceptions about its taste due to zero sugar content, Yakuruto XO received praise for its flavor, leading to increased repurchases. The product contains zero percent sugar, fat, and only 10 calories per 100ml. Hy's patented technology, LF-7, involves fermenting lactic acid bacteria (known for aiding in digestion) for seven days to reduce sugar content while ensuring the characteristic tangy sweetness of fermented milk. HY2782, a proprietary lactic acid strain used in all Hy fermented milks, boosts digestive health by increasing intestinal survival rates of the bacteria. Yakuruto XO guarantees 50 billion CFU's of probiotic strains per bottle. Growing consumer appreciation of its taste and health benefits is driving the surge in sales.