Stack-Through Can Opener

Variety

キャンオープナー(Kyan Ōpunā)

Transliteration

Translation: Can Opener (katakana loanword)

Overview

The stack-through can opener combines the traditional can opener neck crank with a stacking guard pass, driving the opponent's knees toward their face while cranking the neck in flexion. ^[1] From closed guard top position, the attacker clasps the hands behind the opponent's head, pulls it forward and upward, then drives the body forward to stack the opponent onto their shoulders. ^[1],[2] The stacking motion amplifies the cervical flexion by using the attacker's body weight to compress the opponent's spine from both ends simultaneously — the hands pull the head forward while the torso stacks the legs backward. ^[2] This dual compression makes the stack-through variant significantly more painful and dangerous than the standard can opener. ^[2],[3]

Also known as

Stack Can Opener^[1]Pass-Through Can Opener^[2]

Used in

BJJ Judo Submission Grappling MMA Sambo

History & Origin

The stack-through can opener combination developed in MMA and early BJJ competition where aggressive guard opening methods were common. ^[1] As guard passing strategy evolved, the stack-through variant became both a guard opener and a neck crank threat that forced the bottom player to release the guard. ^[2],[3]

Effectiveness

Effective guard opener that pressures the cervical spine through stacking and cranking; historically one of the most reliable ways to force open closed guard ^[1]

Lineage

An ancient grappling technique present in catch wrestling and judo. The can opener was widely used in early MMA and remains a fundamental tool in wrestling-based grappling ^[1]

Competition Record

Banned in many IBJJF divisions (illegal neck crank) but legal and commonly used in MMA and some no-gi events. Historically effective at all levels of MMA competition ^[1]

Images

No images yet for this technique.

Biomechanical Mechanism

Primary Action — Compression of the neck structures — restricts blood flow or airway depending on technique application

Joints Involved — Cervical spine, surrounding musculature, and vascular structures of the neck

Force Vector — Directed compression against the neck from the choking limb or body position

Finishing Mechanic — Sustained pressure causes either vascular occlusion (unconsciousness) or tracheal restriction (breathing difficulty)

Position & Entry

From back control with seatbelt — Establish hooks or body triangle, slide choking arm under the chin, connect hands and squeeze

From turtle top (back take) — Break down the turtle, insert hooks, secure seatbelt grip, slide to back control and apply the choke

From standing back clinch — Secure rear body lock, drag opponent to the mat while inserting hooks, transition to choking position

Variants

Standard grip variation — primary hand configuration for maximum choking pressure

Gi variation — uses the lapel or collar as an anchor for additional friction and control

No-gi variation — adapted grip and positioning for submission grappling without the gi

Transition finish — applied during a positional change to catch the opponent off-guard

Videos

No videos yet

Help build this encyclopedia by suggesting a relevant video.

Learn This Technique

No instructional courses yet for this technique.

Ratings

Danger Rating

Risk of injury to the person this technique is applied to

Very High8/10

Flexion cranks force the chin toward the chest; compresses anterior cervical structures

Difficulty

Skill level needed to execute this technique reliably

Advanced

Competition Legality

Whether this technique is allowed under major competition rule sets

Illegal

— FIAS Sport Sambo — All chokes prohibited in Sport Sambo

FIAS International Sambo Competition RulesPDF

Legal

— IBJJF — Legal at all belt levels, gi and no-gi — chokes a...

IBJJF Rules Book v6.0, June 2024PDF

— shime-waza

IJF Sport and Organisation Rules 2025, Article 27PDF

— ADCC — Legal

ADCC Rules Update, April 2025PDF

— Unified MMA — Legal — choke submissions are among the mos...

Unified Rules of MMA, August 2025PDF

— FIAS Combat Sambo — Legal

FIAS Combat Sambo RulesPDF

Training Notes

✓The stack-through can opener combines the cervical flexion of the can opener with a stacking pass — the attacker simultaneously cranks the head forward while stacking the opponent's hips over their shoulders (Gracie & Gracie, Brazilian Jiu-Jitsu: Theory and Technique, 2001)

✓From inside closed guard: grip behind the head with both hands, drive the chin to the chest (can opener), then stand and stack the opponent — the stacking adds gravitational compression to the cervical flexion

✓The stack-through doubles the cervical stress: the can opener flexes the neck while the stack adds the opponent's own body weight driving downward onto the cervical spine

✓The combined technique forces the guard to open: the cervical pain from the can opener plus the claustrophobic pressure of the stack overwhelms the guard player's comfort

✓The stack-through can opener is more effective than either technique alone: the can opener without stacking can be endured, and the stack without the can opener can be escaped — together they compound

✓Finishing: as the opponent opens the guard to relieve pressure, immediately pass — the can opener and stack are tools for opening the guard, not standalone submissions (in most rule sets)

✓The technique requires strong legs and base: standing in the guard while maintaining the head grip and then stacking requires significant lower body strength

Common Mistakes

!Stacking without the head grip — the can opener component requires hands behind the head; stacking alone doesn't create the cervical flexion

!Applying the can opener without standing — the stack requires standing in the guard; the seated can opener lacks the stacking component

!Using excessive cervical force — the stack adds the opponent's body weight to the cervical stress; the can opener doesn't need to be cranked hard when the stack is assisting

!Not passing immediately when the guard opens — the stack-through creates a brief window; pass instantly rather than continuing to stack

!Losing balance while stacking — maintain strong base; the opponent may sweep if you overcommit to the forward stack

!Attempting against a flexible opponent without a passing plan — flexible opponents may absorb the stack; have a specific pass ready for when the guard opens

!Not being aware of armbar threats — stacking in the guard commits both hands to the head; the opponent may transition to an armbar; maintain arm awareness

Related Techniques

Stack Pass — uses similar forward pressure and neck flexion Neck Crank — shares cervical manipulation mechanic Closed Guard Break — the can opener's primary tactical purpose Rear Neck Crank — similar cervical pressure from a different position

Counter Techniques

Straighten the Arm — extend the arm to break the figure-four grip angle Roll Toward — roll in the direction of the lock to relieve rotational pressure Grip the Belt/Shorts — anchor the hand to prevent the arm from being isolated

Setup Chain

1Control Position — maintain dominant position with weight on the opponent

2Isolate the Arm — secure the wrist and thread the arm through for the figure-four

3Lock the Figure-Four — grip own wrist behind the opponent's arm for leverage

4Apply Rotation — rotate the arm to attack the shoulder joint

Sources & References

Primary Source

JBJJF competition rules; Japanese BJJ community

1CompetitionJBJJF (Japan Brazilian Jiu-Jitsu Federation)

Official Japanese BJJ federation — competition rules and terminology

2OtherJapanese Combat Sports Katakana Convention

Standard katakana transliteration of Western martial arts terminology (外来語) — used in Japanese MMA, boxing, and BJJ communities

3CitationJBJJF competition rules; Japanese BJJ community

Japanese terminology sourced from JBJJF competition rules; Japanese BJJ community

Community

Athletics

Requires

grip or squeeze strength, positional control

Favours

strong upper body for sustained compression

Key muscles

forearms, biceps, pectorals, core stabilisers

Frequently Asked Questions

How does the Stack-Through Can Opener work?

Where does the Stack-Through Can Opener come from?

The stack-through can opener combination developed in MMA and early BJJ competition where aggressive guard opening methods were common. As guard passing strategy evolved, the stack-through variant became both a guard opener and a neck crank threat that forced the bottom player to release the guard.

Is the Stack-Through Can Opener legal in competition?

IBJJF: legal — Legal at all belt levels, gi and no-gi — chokes are the safest submission cat…; IJF: legal — Legal (shime-waza) — strangulation techniques are one of three permitted subm…; ADCC: legal — Legal; Unified MMA: legal — Legal — choke submissions are among the most common finishes in MMA; FIAS Sport Sambo: banned — All chokes prohibited in Sport Sambo; FIAS Combat Sambo: legal — Legal

How dangerous is the Stack-Through Can Opener?

Danger rating 8/10. Flexion cranks force the chin toward the chest; compresses anterior cervical structures

How do I set up the Stack-Through Can Opener?

The standard setup chain: Control Position → Isolate the Arm → Lock the Figure-Four → Apply Rotation.

How do I defend against the Stack-Through Can Opener?

Standard counters include: Straighten the Arm — extend the arm to break the figure-four grip angle / Roll Toward — roll in the direction of the lock to relieve rotational pressure / Grip the Belt/Shorts — anchor the hand to prevent the arm from being isolated.

What are the variants of the Stack-Through Can Opener?

Common variants: Standard grip variation (primary hand configuration for maximum choking pressure); Gi variation (uses the lapel or collar as an anchor for additional fric…); No-gi variation (adapted grip and positioning for submission grappling wit…); Transition finish (applied during a positional change to catch the opponent …).

How effective is the Stack-Through Can Opener in competition?

Banned in many IBJJF divisions (illegal neck crank) but legal and commonly used in MMA and some no-gi events.

What are common mistakes when doing the Stack-Through Can Opener?

Top errors to watch for: Stacking without the head grip — the can opener component requires hands behind the head; stacking alone doesn't crea… / Applying the can opener without standing — the stack requires standing in the guard; the seated can opener lacks the … / Using excessive cervical force — the stack adds the opponent's body weight to the cervical stress; the can opener doe… / Not passing immediately when the guard opens — the stack-through creates a brief window; pass instantly rather than c….

What are other names for the Stack-Through Can Opener?

The Stack-Through Can Opener is also known as Kyan Ōpunā, Stack Can Opener, Pass-Through Can Opener.

kyan pun submission choke and strangle lock neck crank choke cervical flexion crank can opener can opener from closed guard top stack through can opener stack can opener pass through can opener