Magatama

what is magatama???

Magatama (勾玉 or 曲玉), are curved beads which first appeared in Japan during the Jōmon period.
They are often found inhumed in mounded tumulus graves as offerings to deities (see grave goods). They continued to be popular with the ruling elites throughout the Kofun Period of Japan, and are often romanticised as indicative of the Yamato Dynasty of Japan. They are, mainly, made of Jade (翡翠), Agate (瑪瑙), Quartz (石英), Talc (滑石), and Jasper (碧玉).[1] Some consider them to be an Imperial symbol, although in fact ownership was widespread throughout all the chieftainships of Kofun Period Japan. It is believed that magatama were popularly worn as jewels for decoration, in addition to their religious meanings. In this latter regard they were later largely replaced by Buddhist prayer beads in the Nara period.
In modern Japan, the magatama's shape of a sphere with a flowing tail is still the usual visual representation of the human spirit (hitodama). Wearing one during life is considered a way of gaining protections from kami.

Yasakani no Magatama
The most important magatama is the Yasakani no Magatama (八尺瓊曲玉, also 八坂瓊曲玉), which is part of the Imperial Regalia of Japan, added some time around the Heian period. The Yasakani no Magatama stands for benevolence, and is one of the three items used in the ceremony of imperial ascension. In Japanese mythology, the jewels, along with the mirror, were hung on the tree outside of Amaterasu's cave (where she had hidden) to lure her out. It is believed to be a necklace composed of jade magatama stones instead of a solitary gem as depicted in popular culture. It is believed to be enshrined in Kokyo, the Japanese Imperial Palace.
In popular culture, the Yasakani no Magatama has been presented as a baseball-sized orb with a tail, similar to a three-dimensional comma, cored through by a hole in the center. It is thought that the original magatama was broken somehow and crafted into the jade necklace that is the current one, though there is no historical evidence that points to this. (en.wikipedia.org/wiki/Magatama)