This is sort of a theoretical question that isn't as superficial as it will initially sound--

Take any one of the three living 10th dan judoka, the youngest of whom is 86.

I would imagine that the attainment of this rank connotes complete and utter mastery of all existing aspects of judo. I would think all three of them should be in the top ten for most skilled living judoka (possibly some of the other 9th or 8th dan judoka are on their level? I am uncertain as to the nature of the knowledge/skill gap that apparently exists between dans at that level-- which is where my question lies).

But these 10th dan judoka are all extremely old. They may be in excellent shape, but their bodies lack the power they had at the age of 30, it would be impossible to retain that sort of fitness level into your 90s.

So I'm wondering, sort of, is the knowledge/skill level of a 10th dan judoka so great that they could (despite their weaker body) easily overcome a 6th/7th dan in the prime of their youth and fitness?

2 Answers 2


What makes a 10th dan?

While judo 10th dans are all supremely skilled at judo, the difference between a 10th dan and a 6th dan is not technique nor judo skill, but rather contribution to the art. Consider these excerpts from a list of profiles of judan-ranked judoka:

  • He was unbelievably energetic and eventually stood at the head of the Kodokan's instructors. The speed with which he mastered the techniques of Judo can only be matched by the rapidity of his promotion... He was a permanent member of the Kodokan Dojo Consultative Group. He is the author of the Canon of Judo.

  • As a young man he was very keen to go abroad but in 1906 was asked to become Judo instructor at Keio (the oldest private University in Japan) and he remained there for more than fifty years, devoting his whole life to the work. He was a member of both the Kodokan Council and the Dojo Consultative Group.

  • In 1899 he became the head of the Judo Section of the Butokukai and later traveled extensively teaching at schools and police establishments. In 1931 he began teaching at the Kodokan and was a member of the Dojo Consultative Group.

  • All his efforts were poured into the training of young teachers and he was of the greatest assistance to the President of the Kodokan. He did much to gain for the Kodokan the secure position it enjoys today

  • The Shihan's assistant from the very founding of the Kodokan, he is one of the great names in Judo. He entered the Kodokan in 1884 and gained a formidable reputation from his contests with the strong men of other jujutsu schools during the Meiji period. He later went to the United States where he taught Judo to President Theodore Roosevelt.

  • he worked for many years spreading Judo and training new teachers.

  • Author of Kodokan Judo: Throwing Techniques, and several other judo textbooks. He has been the chief instructor at the Kodokan for many years, manager of the Japanese Judo Team at the 1976 and 1984 Olympics, an international referee, and he won the All Japan Judo Tournaments in 1951 and 1954.

The repeated themes are not competitive success, though that is a factor and certainly important. Nor is it technical mastery, though all of them possess that too. It is devoting one's life to judo: working to further the art, training new students and instructors, moving in order to establish a far-away school, representing judo in government.

In the end, the ranks above 6th dan are for spreading the art, political success within the ranking bodies, past competitive success, and sharing the highest level of technical expertise with the next generation of students. So no, the 70-year old 10th dan on the brink of death who sits in a chair to teach class is not going to beat a 26-year-old 4th dan who recently medaled at the Olympics. That's not what the 10th dan is awarded for.

High-ranked eldery judoka in competition

Elite competitive judo is a game for the young. The training necessary to maintain the razor's edge of conditioning and reflex is severe, and not suitable for the elderly. That's not to say that old judoka can't be competitive and best their younger counterparts, but merely that there is a reason that judoka in their 40s don't win the Olympics in judo. However, it is interesting to note some of the age-outliers, as in this 36-year-old:

One of his impressive competitions was the May 1926 Emperor's Cup final facing one of the young upcoming strong players, Ushijima Tatsukuma, a 26 year old 5th Dan. He won a decision here after a hard competition to take the title.

To understand this, watch 10th dan Kyuzo Mifune's Essence of Judo, particularly the parts where he plays randori. Randori is meant to be as vigorous as possible, but one does not smash weaker players unless they are training for competition. Mifune's opponents are attempting techniques but not attempting to overpower Mifune. If they did, he would be in danger of injury--and they in danger of injury and social backlash.

  • 3
    Very, very good answer.
    – stslavik
    May 22, 2013 at 18:28
  • Dayum. That is fantastic
    – Btuman
    Dec 20, 2013 at 14:35

To answer a part of your question, I am a 1st dan and I studied with Hiroshi Nakamura (who's a 9th dan) in Canada from the age of 8 until 21. At about age 16, I was beating him in randori regularly and he stopped sparring with me (to my knowledge, though, he was better than me on the ground when I quit).

Physical skills and competition prowess don't count for much when you're going for higher dan grades.

I received my black belt when I was 16. I never tried for my 2nd dan; I didn't need it to win competitions. I imagine if I had made my whole life about judo, I would've started going for a higher dan AFTER I quit competitions. So I would've gone for my 2nd in my late 30s.

Taken from Judo in Canada wikipage

...an 'outstanding' candidate for godan (fifth dan), for example, can be promoted after five years in the previous grade, but a 'good' candidate would have to wait eight

Do the math. You will end up OLD by the time you reach 8th or 9th dan, even when you are an outstanding candidate.

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