Rank in Judo first five are colored black, 6th, 7th, and 8th "dan" have alternating red and white panels (dandara), and for 9th, 10th "dan" and above, the belts are solid red. In judo's promotion system as originally finalized by Kanō around 1926 there was no maximal dan rank, and judoka holding 10th dan would normally wear a red belt, but also could wear a white belt, the same color as the lowest kyū rank. However, since the highest dan rank reached in judo for a living person or conferred posthumously remains 10th dan, any judo dan rank higher than 10th dan is
The Canon of Judo mentioned. In the book, Kyuzo Mifune explains his metaphysical view of Judo, its role in Japanese society (and the world), and benefits to the individual player. He notes that Judo initially only included throws, and explains the difference between Judo and Ju-jutsu. He discusses the role of competition in Judo, and the purpose of free practice, randori, and explains that it is an indispensable part of the sport. Although the book mentions the five kata, it does not cover them. Furthermore, it does not cover Atemi-waza, but states that Atemi-waza include strikes, kicks, hits, and attacks using the fist, foot,