無窮天穏（むきゅうてんおん） 天頂（てっぺん）生酛純米大吟醸 原酒 1回火入れ - 自社氷温熟成 R1BY -

This is Tianwen's flagship product, a pure rice daiginjo originally from the 'Tenten' sake of the first brewing year of the Heiwa era, now with one fire distillation. It has a complex aroma and a delicate mouthfeel with a perfect balance of sweetness and acidity.

• The description claims a perfect balance of sweetness and acidity.