Mars Tsunuki distillery opened in 2016 in Minami-Satsuma, Kagoshima — the southernmost prefecture of Japan's main islands and the heartland of shochu production. It is the second distillery operated by Hombo Shuzo, joining the alpine Mars Shinshu distillery in Nagano. The two distilleries could hardly be more different: where Shinshu sits at 800 metres in the Japanese Alps, Tsunuki operates at sea level in a subtropical climate with summer temperatures exceeding 35°C.
That climate is the defining factor. The heat accelerates maturation dramatically, driving aggressive interaction between spirit and wood. The result is a young whisky that tastes considerably more mature than its age — rich, oak-forward, with tropical fruit notes that reflect both the climate and the cask influence. At 59%, the first release is bottled at cask strength, presenting the full force of this subtropical maturation without dilution.
Mars Tsunuki represents an experiment in terroir — the question of whether the same parent company, using similar distilling techniques, can produce fundamentally different whiskies by changing location and climate. The answer, based on this first release, is emphatically yes. Tsunuki's whisky tastes nothing like Shinshu's — warmer, richer, more tropical — and as the distillery accumulates experience and stock, the potential for distinctive, high-quality Japanese whisky from this unusual location is considerable.
