Rank in Judo English language edition (1955) of "Illustrated Kodokan Judo", edited by the Kōdōkan, says: This statement was later clarified, however. Essentially, the dan-rank system was capped at 10 after the death of Kanō. In that respect, in the November 1963 issue of "Jūdō", the Kōdōkan's official magazine, the Kōdōkan responding to the question "Do the 11th and 12th Dan really exist?" clarifies that the hierarchy now stops at 10 and that the Kōdōkan does not envisage any nominations to these grades. There have only been fifteen 10th dan promotions awarded by the Kōdōkan in the history of Judo. Although "dan" ranks
Judo in the United States AAU sport, and there have been national competitions and tournaments ever since. The United States formed an Olympic team and competed in the 1964 Summer Olympics, which it continues to do to this day. Judo is now practiced by and estimated 100,000 American men, women, and children (25,000 registered in either the USJA, USJF, and USA Judo). America's first major contact exposure to judo came through President Ulysses S. Grant in 1879. He was in Japan for a state visit and observed a judo demonstration. In 1889, Kanō Jigorō gave a lecture on the philosophy of judo to several Americans;