It accommodates a Kagami Mochi measuring 10cm on each side.

---- About Sanpo

The "Sanbo" (三方) in Shinto, the indigenous spirituality of Japan, is a stand used for placing offerings to deities during religious ceremonies. Traditionally, it was also used to present items to high-ranking individuals. In temples, a similar item is used, sometimes referred to as "Sanpou" (三宝), alluding to the Buddhist trinity of Buddha, Dharma, and Sangha.

Typically made of plain wood like hinoki (cypress), the sanbo consists of a rectangular base, called "dou", and a tray-like top, known as "oshiki". The base has three directional holes, hence the name "sanbo", which means three directions. Originally, the oshiki and dou were separate and could be used independently, but in modern times, they are often combined into a single piece. Special oshiki are prepared when only the tray is used.

When presenting offerings in front of deities, the side without holes (opposite the side with fastening stitches) faces the deity. The correct way to hold a sanbo with offerings is to place thumbs on the edges and other fingers on the oshiki and dou, holding it at eye level. However, in imperial court rituals, there is a tradition of hooking fingers inside the oshiki.

Various special forms of sanbo exist, such as Itaashi Sanbo (board-footed sanbo) and Maru Sanbo (round sanbo). There's also a type with four holes called "Shiho", used for placing a short sword during harakiri (ritual suicide). Different styles of sanbo, like Toyama Sanbo, Nuri Sanbo, Shiraki Sanbo, and others, are used in shrines.