Sumi-otoshi
隅落すみおとし
- Te-waza
- Gokyō: Dai-gokyō
Key idea
The defining action takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot.
Kodokan official demonstration
Kodokan technique list (opens in a new tab)YouTube (opens in a new tab)
How it works
The central principle of Sumi-otoshi is the coordinated action that takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot.
Kuzushi
Create usable imbalance
Create the imbalance described by the official definition and continue it into the entry. Uke should not be able to recover stable support before the decisive action.
Tsukuri
Enter and stay connected
Enter with stable posture and continuous control. Use the official demonstration to check the required position, contact line, and direction.
Kake
Complete the defining action
Complete the defining action described in the official definition and shown in the demonstration. Maintain control through uke’s fall.
Key points
- To identify Sumi-otoshi, watch for the moment the hand-led control becomes decisive rather than naming the technique from the landing alone.
- The official definition centres on an action that takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot.
- When reviewing Sumi-otoshi, check that balance breaking, contact and direction stay connected from entry through the controlled finish.
Similar techniques
| Technique | Japanese name | Key difference |
|---|---|---|
| Uki-otoshi | 浮落 | Uki-otoshi uses hand control and a sharp forward-corner pull to send uke down without loading the body onto the hip; Sumi-otoshi takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot. |
| Obi-otoshi | 帯落 | Obi-otoshi controls the front of the belt and hip from behind,; Sumi-otoshi takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot. |
| Tai-otoshi | 体落 | Tai-otoshi converts front-corner instability into a forward drop across a positioned body line; Sumi-otoshi takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot. |
Reference
Open the detailed source material when you need definitions, technical distinctions, training context, or references.
Official definition
What this technique is
Within the Kodokan list, Sumi-otoshi belongs to hand techniques. Its name is attached to the action that takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot, not to every contest exchange that ends in a similar fall or final position. The official Sumi-otoshi demonstration is therefore the best starting point for recognizing the technique before comparing variations in timing, grip or stance.
Core principle
The central principle of Sumi-otoshi is the coordinated action that takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot. In this technique, timing, balance breaking and continuous control must work together. Pause the official Sumi-otoshi demonstration before the decisive action and check what support remains, where contact is maintained and whether tori is lifting, reaping, blocking, rotating, wrapping or applying controlled pressure.
Detailed execution
Key recognition points
- To identify Sumi-otoshi, watch for the moment the hand-led control becomes decisive rather than naming the technique from the landing alone.
- The official definition centres on an action that takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot.
- When reviewing Sumi-otoshi, check that balance breaking, contact and direction stay connected from entry through the controlled finish.
Distinguishing this technique
The practical identifying feature of Sumi-otoshi is the hand-led control: takes uke toward a rear corner through hand-driven balance breaking and a well-placed step outside the foot. Compare that action with neighbouring names in the same Kodokan category. If the contact point, control route or sacrifice direction changes, the result may belong under a different official name even when the landing position looks similar.
Training and safety
Training and safety
Practise entries, controlled finishes, and ukemi under a qualified Judo instructor. Competition rules and permitted applications can vary, so confirm the current ruleset before competitive use.