R's KOSO is a century-old traditional Japanese postbiotic superfood drink company offering a wide range of drinks and cleanse products made from over 100 fruits and vegetables. The products are designed to improve gut health by incorporating the wisdom of Japan in cleaning and uplifting bodies, minds, and spirits in the modern world. With a special combination of sake yeast, lactic acid bacteria, and koji, KOSO aims to provide a unique and beneficial fermented drink experience for customers looking to enhance their overall well-being.