Mars now produces Japanese whisky through two main distillery sites: Mars Komagatake Distillery in Nagano, located at the foot of the Central Alps, and Mars Tsunuki Distillery in Kagoshima, the birthplace of Hombo Shuzo. Komagatake sits at 798 metres above sea level and is associated with cooler mountain maturation, while Tsunuki has a warmer southern climate and a long local history of shochu production. The portfolio includes single malts such as Komagatake and Tsunuki, blended malts such as Mars Maltage Cosmo, and blended whiskies including Iwai Tradition, with bourbon, sherry and wine casks used across different releases.