Beigoma

Beigoma are traditional Japanese spinning top toys.

A small but heavy disk shaped toy of approximately 3cm in diameter, it is spun by wrapping a thin 60 cm cord around it, then throwing it while releasing the cord to spin it onto a surface such as matting spread across the top of a barrel.

The thrower aims it at another beigoma that is already spinning to knock it out of the playing area. *
The loser is the player whose top either stops spinning first or is knocked outside the area.

If spun correctly it makes a humming sound.
They are often decorated with kanji, for example with names of famous baseball players.^[1][2][3]

Beigoma may have come to Japan from China, originating as Koma (wooden toys), popular with ordinary people in the Kamakura period.

The toy was well known in the 17th century Edo period and was originally made by filling spiral seashells with sand and sealing them with molten wax.

In 2001 there was only one factory still making them, in Kawaguchi, Saitama prefecture.^[2][3][4]

Recently, the popular Beyblade toy, which is modelled after beigoma has caused a re-surge in interest. Beyblades are similar to beigoma but have no stem.^[4][5][6][7]

The Kamakura period (鎌倉時代 Kamakura jidai^?, 1185–1333) is a period of Japanese history that marks the governance by the Kamakura Shogunate, officially established in 1192 AD in Kamakura, by the first shogun Minamoto no Yoritomo. The period is known for the emergence of the samurai, the warrior caste, and for the establishment of feudalism in Japan.