What is the traditional wooden box used for serving sake called?

The traditional wooden box used for serving sake is known as a masu. This form of container dates back to the Edo period in Japan and is often made from cedar or other types of wood, which can impart a unique flavor to the sake when served in it. The shape and size of a masu are typically cubical, and it has been historically used as a measuring device for rice before being adapted for serving sake.

The significance of using a masu also extends to cultural practices, such as celebratory occasions where the box is filled to the brim, symbolizing abundance and prosperity. This custom reflects the social and ceremonial aspects of sake drinking in Japanese culture, enhancing the overall experience.

The other options do not correspond to the traditional wooden box for sake. Tsumami refers to small snacks or appetizers served with sake, Suwa does not relate to a serving container for sake, and Tachiwaki typically involves a style of serving sake that reflects different contexts. Thus, the masu stands out as the correct term for the traditional serving box.