A tamasay is a bead

Bead

A bead is a small, decorative object that is usually pierced for threading or stringing. Beads range in size from under to over in diameter. A pair of beads made from Nassarius sea snail shells, approximately 100,000 years old, are thought to be the earliest known examples of jewellery. Beadwork...

 necklace

Necklace

A necklace is an article of jewellery which is worn around the neck. Necklaces are frequently formed from a metal jewellery chain. Others are woven or manufactured from cloth using string or twine....

 worn by Ainu

Ainu people

The , also called Aynu, Aino , and in historical texts Ezo , are indigenous people or groups in Japan and Russia. Historically they spoke the Ainu language and related varieties and lived in Hokkaidō, the Kuril Islands, and much of Sakhalin...

 women for special occasions.

The necklace is called a shitoki if it has a medallion. They are made with large glass

Glass

Glass is an amorphous solid material. Glasses are typically brittle and optically transparent.The most familiar type of glass, used for centuries in windows and drinking vessels, is soda-lime glass, composed of about 75% silica plus Na2O, CaO, and several minor additives...

 beads the Ainu obtained through trading with Chinese

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 merchants. The Ainu also obtained glass beads secretly made by the Matsumae Clan. The shitoki medallion often represents the white-tailed sea eagles that the Ainu hunt. The more strands and beads a necklace has, the more valuable it is. The necklaces are passed down through generations and are highly treasured by their owners. This jewelry is especially important in ceremonies and rituals because it is believed to protect the wearer from evil spirits.