The #1 brand in Busan. This Soju claims to not give hangovers due to asparagine. C1 Blue is one of the most smoothest Soju’s out there. It is made by a process called SOVIA which stands for Sound Vibration Aging Process which is looked upon as the best aging technique for Soju. It also uses natural bedrock water which comes from Mount Samgak, Gijang.