judo66 wrote:Shohei Ono, last uchi-mata was more a hane-goshi don´t you think so?
I do think so and the japanese newspapers think so too.
I stopped the vid at 3.52, ono's leg certainly did not look like an uchi-mata leg was CK commenting on the earlier throw?
And what precisely is an uchi-mata leg ?
You have people moving, people resisting, people shifting, at no point is the opponent lifted on the leg. Where exactly the leg is, makes little of no difference unless one wants to start differentiating between taka-uchi-mata, ko-uchi-mata, and ô-uchi-mata. The specific form employed here is called "okurikomi-uchi-mata
Hane-goshi is virtually unseen as a throw in competitive jûdô as it is that difficult to pull off. Name one hane-goshi expert among the hundreds of continental, world or Olympic champions. I am not even sure that if you would step on the mat with Ôno for a friendly interaction and ask him to demonstrate hane-goshi on you that he would be able to do a proper hane-goshi. Even on YouTube, you'd be hard-pressed to find a single true hane-goshi in competition. You'd have to go back to the 1960s almost to find a true hane-goshi expert who threw in competition with hane-goshi. I remember a couple of occasions where people I knew very well scored in competition and where people started arguing that the throw wasn't harai-goshi but ashi-guruma because of how and where his leg was and so and so, when I knew for 100% that the person could not even perform a proper ashi-guruma statically, never could and couldn't even today. The biomechanical mechanisms of these throws are quite different. Just like it's still sasae-tsuri-komi-ashi if you put the blocking foot at the height of uke's knee and apply the biomechnics of sasae, and just like it's still hiza-guruma when you block the opponent just above the foot and apply the biomechanics of hiza-guruma. It's obvious that Ôno's tokui-waza is uchi-mata and for someone of his level who is part of world elite class judoists, he can hence perform that throw out of a variety of angles, still pull it off despite a variety of reactions, despite having lost control partially with an arm or a leg. He knows what his margins are and for errors that he makes here or there he instinctively reassesses and compensates. It's that what coordination means in jûdô.
The high incidence of uchi-mata in jûdô competition and is preference by so many jûdôka is not mere coincidence. There is a proper scientific reason for that. Biomechanical analysis has shown that uchi-mata was the throw where the person performing it generated the highest power of any throw. In other words, even a relatively small and weaker person using uchi-mata can generate much more power than with virtually any other jûdô-throw. For that reason learning and mastering uchi-mata is important and gives you a dangerous and effective weapon. If you think of uchi-mata specialists in competition there is no end to the list, same with seoi-nage. So, even when people pick throws because "they look cool", at the end of the day, the underlying subconscious reason why so many people in jûdô stick with so few throws, has its objective reasons.
In terms of physics uchi-mata is the reverse equivalent of ô-soto-gari (I am talking physics now, not the 'pedagogy' or 'tradition' or 'history'). Both throws rely on the physics principle of a mechanical couple. The advantage of these throws is that they can be performed without any kuzushi, and without needing any so-called "stopping moment". That makes them highly effective, and 'easier' to pull off than, let's say, tai-otoshi or uki-otoshi. 'Easier' means obviously if you technically master them. But basically, you can still pull these throws off even when kuzushi totally fails, as long as you master the coordination and principle of the throw. That is a huge advantage. If you want to go really gungho on this, be my guest:
Yabune, T. 籔根敏和, Tokuda, S. 徳田真三, Nagatani, Y. 長谷川裕, & Yano, M. 矢野勝. Jūdō nage-waza no honegumi uchi-mata
柔道投技の骨組み 内股 [The framework of jūdō throwing techniques: uchi-mata]. Tōkyō: Fumaidō shuppan 不昧堂出版; 2005; Pp. 1-104.
Sacripanti, A. La revisione biomeccanica dei fondamenti del judo Kodokan del Dr. Jigoro Kano. Med Sport
65, 2: 265-281, 2012.