noun
cask sake; barreled sake
Sake that has been aged or stored in a wooden cask, often imparting a woody flavor.
この居酒屋では樽酒が楽しめる。
You can enjoy cask sake at this izakaya.
樽酒は木の香りがする。
Cask sake has a woody aroma.
日本酒 is the general term for Japanese sake, while 樽酒 specifically refers to sake stored in wooden casks.
Compound of 樽 (たる, 'cask') and 酒 (さけ, 'sake'). The reading たるざけ is a rendaku form.