O-soto-guruma (large outer wheel) is a leg technique from the fifth group of the gokyo. Tori slides his leg behind both of uke's legs at knee or calf height. He then tips uke backward around that axle, with no reaping.
O-soto-gari or o-soto-guruma?
People mix them up all the time, brown belts included, especially since both are ashi-waza within nage-waza. The gokyo puts o-soto-gari in the first group and o-soto-guruma at the head of the fifth. The start is the same. You step in beside uke, chest to chest, and drive him backward. Everything is decided by the attacking leg.
In o-soto-gari, that leg reaps uke's right leg, the one carrying his weight. In o-soto-guruma, it reaches further, passes behind both legs and stays put like a bar. Uke does not lose one support. He loses both at once.
The practical upshot is simple. O-soto-guruma works when uke's feet are close together, almost parallel. O-soto-gari works when one foot is clearly forward.
How to do o-soto-guruma (right-handed)
The hikite pulls uke's right sleeve down and against your side. The tsurite pushes the lapel toward his left shoulder and back. Uke ends up on his heels, weight spread over both feet.
Your left foot lands beside his right foot, slightly ahead of it. Your right leg passes behind his right leg, carries on behind his left and settles there. The sole of your foot can touch the mat or hover just above it.
Then turn your upper body to the left and downward, as if looking behind you. Uke pivots around your leg and lands on his back.
Kuzushi: where most attempts fail
Without rear off-balance, uke simply steps back and your leg ends up in thin air. The kuzushi is often set up by a forward attack first. Uke resists, straightens up and shifts his weight back. That is your cue to go backward.
Common mistakes
- Leaning back as you attack. It is the perfect opening for o-soto-gaeshi, the counter that sends the technique back at you.
- Not reaching far enough with the leg. It only catches one of uke's legs, and you are left with a badly placed o-soto-gari.
- Attacking from a distance. Your chest has to touch his, or the wheel has no hub.
Combinations that work
The classic one: you attack with o-soto-gari, uke pulls his right leg back to avoid it and brings his feet together. Keep the contact and push your leg further behind both of his. Same direction, one notch deeper.
Another option is to come from the front. An o-uchi-gari feint makes uke step back, and his feet come together to stabilize. O-soto-guruma follows straight away.
Compare it with o-guruma, the large wheel without the "outer". Same axle idea, but forward and across the front of the hip.
Defense and counters
Uke can drop his hips and widen his stance, which kills the technique. The most common counter remains o-soto-gaeshi, or an ura-nage if tori committed by leaning in. Against a much taller opponent the throw struggles, because your leg cannot reach far enough behind both of his.
Drills for o-soto-guruma
Start static. Uke stands with feet together. Tori places the leg behind both legs and checks that he can feel both calves. Then add the upper body rotation, still without a fall. Finally, on the move: uke steps back and tori follows. When uke's feet come together, tori puts the technique in.
A good habit for a class is to teach it right after o-soto-gari on the same day. The two movements are easier to tell apart side by side. Each judoka leaves with one more option for when his favorite throw gets dodged.