Kendama bears similarities to the classic cup-and-ball game, and the Hispanic world toy known as boliche or balero. The principle of these toys are the same: catching one object with another, where both are joined by a string. However the modern kendama style takes influences from a diverse range of skills including yo-yo, diabolo, juggling and dance.
Structure and terminology
Origins, precursors, and parallels
The origins of the game are disputed. It has been described as a variation French ball-and-cup game bilboquet which dates to the 16th century. It is generally agreed that Kendama dates to the late 17th or early 18th century.
The kendama arrived in Japan via the Silk Road in around 1777, at which point Nagasaki was the only port open to foreign trade. Reportedly, kendama was initially a sort of adult's drinking game — a player who made a mistake was forced to drink more. The game gained popularity during the Edo Period (1600-1868).
In the early 20th century, the toy had two side cups and was called a jitsugetsu ball (日月ボール?). This translates to 'sun and moon ball', named so because of the ball's representation of the sun and the cups' likeness to the crescent moon.
In 1919, Hamaji Egusa applied for a patent on the 'ball and cup' style toy and it was awarded in 1920. The size and proportions of the toy were later altered. Hatsukaichi City in Hiroshima Prefecture is considered to be the birthplace of the modern Japanese Kendama. The current competition design descends from Issei Fujiwara's model, which featured string holes in the crosspiece. Little deviation has been made from his basic design, with the exception of the ken becoming more rounded to reduce wood chipping. It was also Fujiwara who established the Japan Kendama Association, which established the rules for play, the grading system now in use, and organised competition. In order to ensure that the toy was suitable for use in competition, the JKA also standardised kendama itself.
Today, kendama is popular in many parts of the world. Kendama is particularly well loved in Japan, where national tournaments are held and Japanese employers recognise applicants who have attained the higher dan rankings as "persistent, patient and determined potential employees".
During the 2000s, kendama surged in popularity outside Japan. In 2006 KendamaUSA and the British Kendama Association were founded  and began to promote kendama in North America and Europe, particularly throughout the juggling and rollerblading communities. As players worldwide began to put videos online, kendama continued to grow and has branched out forming its own global community.
To play with a kendama, one holds the toy, and pulls the ball upward so that it may either be caught in one of the cups or land with the hole on the spike. More advanced tricks include sequential balances, juggles, and catches. There are eleven prescribed moves on the kendama trick list for achieving a kyu ranking and several more for a dan ranking. A 10-kyu rating (the lowest beginner grade) is attained by simply catching the ball in the largest cup. A book published by the Japan Kendama Association lists 101 different tricks for the toy and there are supposedly tens of thousands of trick variations. Different stances and grips are required to perform different tricks.
While most people play with kendamas for personal satisfaction, competitions do take place, especially in Japan, where many kendama shokūgekìs (Japanese for battle) are held. Participation in such competitions entails performing lists of tricks in sequence or completing particular tricks repeatedly for as long as possible. Additionally, tricks may be performed head to head with a rival to determine a winner. The first competitor to fail a trick loses.
In the trick moshikame (もしかめ?), the ball is juggled between the big cup and the smallest cup at the bottom repeatedly. A Japanese children's song of the same name is often sung to help with timing.
The British Kendama Association held the first formal kendama contest outside Japan in 2008 at the British Juggling Convention in Doncaster and has been staging a British Kendama Open and European Kendama Open every year since. These contests have taken a variety of formats including trick ladders, speed battles, freestyle, and the head-to-head world championship style.
The Global Kendama Network (Gloken) held the first Kendama World Cup in 2014 in Hatsukaichi, Japan, utilizing a new format whereby players choose 5 tricks from a list of 100 and attempt to complete tricks within a time limit. These tricks are classified according to difficulty into 10 different levels and the player receives points corresponding to the level of the completed trick i.e. a level 7 trick is worth 7 points and but a more difficult level 10 trick is worth 10 points
In the competition, Bonz Atron, ( Corbin Stafford) of Kendama Co & Bonzaikendama.com, was the champion in the 2014 edition, and in the 2015 edition, Wyatt Bray of Kendama USA took home the title of champion. There is also the MKO (Minnesota Kendama Open) that usually takes place at the Mall of America in Bloomington Minnesota.
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