JJK Barriers Explained: Curtain, Domains & Simple Domain

Quick answer

Barrier techniques mark off a zone to hide, trap or keep people out; the Curtain, Domain Expansion, Simple Domain, Tengen’s barriers and the Culling Game colonies are all barriers.
The Curtain chant is “Emerge from the darkness, blacker than darkness. Purify that which is impure.” (Ch. 6, Episode 4); fans also call it the veil.
Conditions are set with binding vows: the Goodwill Event Curtain repelled only Gojo in exchange for letting everyone else in (Ch. 45), and Shibuya’s Curtains trapped civilians and kept sorcerers out (Ch. 83–94).
Domain barriers are reinforced from the inside, which makes them weak from outside; that is how Sukuna’s barrierless Malevolent Shrine cut Gojo’s domain apart (Ch. 225).

In Jujutsu Kaisen, a barrier (結界, kekkai) is a zone that sorcery marks off to hide, trap or keep people out of a space. Barrier techniques are the skills that build those zones: the Curtain that hides every exorcism, Domain Expansion, Simple Domain, Tengen’s nationwide network and the Culling Game colonies all run on the same idea.

Below is a comparison table of every major barrier, the Curtain chant, how conditions (“only Gojo can’t enter”) work, and why a barrier strong on the inside is weak on the outside. Spoilers go up to the Shinjuku Showdown (around Ch. 226) and the end of the Culling Game setup. Anime episodes use overall numbering: S1 = 1–24, S2 = 25–47, S3 = 48–59.

How do barrier techniques work?

Barrier techniques are a non-innate kind of jujutsu. Anyone with enough cursed energy can learn them, but talent varies a lot. To make a barrier, the user builds a formula inside themselves, adds empowered words (the chant), and runs cursed energy through it (Ch. 86).

A few rules come up again and again:

“Barrier” doesn’t mean “wall.” The Japanese word means a bounded zone. An outer shell is only one possible part. Curtains have one; some barriers don’t (Ch. 94).
Conditions are the hard part. Putting up a plain barrier is easy. Making one that lets only certain people out takes real skill (Ch. 129), and barring one specific person while admitting everyone else is complex (Ch. 45).
Barriers only “see” cursed energy. They register people with cursed energy and ignore objects and buildings (Ch. 198).
Innate talent isn’t required, and doesn’t guarantee it. Curtains are routinely cast by assistant managers who have no innate technique (Ch. 6, Ch. 55), while many strong sorcerers with innate techniques can’t do barrier work at all (Ch. 86).

If you need a refresher on terms like binding vow or cursed technique, see our JJK terms glossary.

Every barrier type compared

Barrier	Purpose	What it blocks / who can pass	Who uses it	Key chapter
Curtain (帳, tobari; also called “veil”)	Hide sorcery from the public; draw curses out	Non-sorcerers can’t see inside. Default shell can be broken by force; conditions can trap civilians, keep sorcerers out or target one person	Assistant managers (Ijichi), Gojo, Geto, Mahito, Kenjaku, curse users with talismans	Ch. 0-1, Ch. 6 (Episode 4)
Domain Expansion	Manifest the user’s innate domain with their technique imbued in the barrier	Closed shell; attacks inside are guaranteed to hit. Reinforced from inside, so it’s hard to escape	Gojo, Sukuna, Mahito, Jogo, Yuta, Higuruma and others	Ch. 15 (Episode 7)
Simple Domain	A small “domain for the weak” with programmed rules	Neutralizes a domain’s sure-hit within its range; strong domains overwhelm it in seconds	Miwa, Kusakabe, Gojo, Yuki, Ino and others	Ch. 35 (Episode 15), Ch. 171
Hollow Wicker Basket	Older anti-domain technique; predecessor of Simple Domain	Cancels a domain’s technique-imbued sure-hit; useless against attacks that aren’t the sure-hit	Reggie Star, Sukuna	Ch. 171 (Episode 58)
Jujutsu High barriers (Tengen)	Hide the schools	The layout changes daily to hide the campus; weak against intruders who already know the location	Tengen	Ch. 53 (Episode 21)
Tengen’s pure barriers	Nationwide network that suppresses curses and boosts managers’ barrier techniques	Four are critical: Imperial Palace, Tombs of the Star, Yamakuni Mausoleum, Holy Mountain of Hida	Tengen	Ch. 220
Culling Game colonies (bon barriers)	Ten arenas for Kenjaku’s merger ritual	Non-players who enter become players; confinement is strengthened by the premise that players entered freely; phone signal blocked	Kenjaku, built on Tengen’s pure barriers	Ch. 143 (Episode 49), Ch. 146, Ch. 220
Prison Realm	Seal one target forever	A living barrier inside a cursed object that can seal anything; target must stay within 4 m for “one minute” in their mind	Kenjaku	Ch. 90–91 (Episodes 33–34)

The rest of this guide goes through each one.

Curtain (Veil): the chant and what it does

The Curtain is the barrier readers see most. It drops a dome-shaped dark shell over an area, turns the sky inside to night to draw cursed spirits out, and hides everything inside from non-sorcerers. From outside, ordinary people see the area as it was at the moment the Curtain went up. Sorcerers, even “windows”, can see the black shell (Ch. 0-1, Ch. 6).

The Curtain chant (as recorded on the JJK fan wiki):

Japanese (romaji)	English
Yami yori idete yami yori kuroku sono kegare o misogiharae	“Emerge from the darkness, blacker than darkness. Purify that which is impure.”

Ijichi explains the Curtain to Yuji and says this chant at the detention center mission (Ch. 6, Episode 4). The chant is the “empowered words” part of the technique. The sources we checked don’t define a fixed hand sign for the Curtain, so the incantation is the part to remember.

Curtain or veil? Both names refer to the same thing (帳, tobari). The fan wiki’s main name is “Curtain” and lists “Veil” as an alternate name; many episode summaries and anime-focused articles say “veil.” We haven’t checked line by line which official release uses which, so treat them as interchangeable.

Two side effects matter in the story:

Specialized Curtains block phone signals. Ino points out that this is a secondary effect, because conditions are usually about curses (Ch. 83).
Talismans let others cast them. A skilled barrier user can “commission” a Curtain into a talisman or stake. Anyone who recites the chant and feeds it cursed energy can then use it (Ch. 94).

Condition-setting: the Curtain that kept Gojo out

A Curtain’s real power is its conditions, set with binding vows. The key trade-off is always give something to get something.

Curtain	Condition	Trade-off	Chapter
Satozakura High (Mahito, taught by Kenjaku)	Humans with weak cursed energy can leave but can’t enter	—	Ch. 25 (Episode 11)
Goodwill Event (Juzo Kumiya’s commissioned Curtain)	Repels Satoru Gojo	Everyone else can enter freely; the visual effect is delayed so the condition takes hold faster	Ch. 45 (Episode 18)
Shibuya, first Curtain (7:00 p.m., 400 m around the Tokyu Department Store)	Non-sorcerers can enter but not leave; sorcerers move freely	Phones blocked inside	Ch. 83 (Episode 31)
Shibuya, Meiji-Jingumae Station (held by Ko-Guy)	Sorcerers can’t go below B2F	Broken when Yuji beat the curse and smashed the talisman	Shibuya arc (before Ch. 91)
Shibuya, outer Curtain	Keeps sorcerers out of central Shibuya	The casters stayed outside it, at the most obvious spot (Shibuya Tower), to make it stronger	Ch. 91, Ch. 94 (Episode 35)

So the Curtain built specifically to block Gojo is the Goodwill Event one (Ch. 45), not a Shibuya one. In Shibuya the plan was the reverse: by the time Gojo was sealed, four Curtains overlapped. Two kept Gojo and civilians inside the Hikarie building, and a larger one kept other sorcerers out (Ch. 91, Episode 34).

The Shibuya Tower Curtain shows the risk-reward logic well. Yuji’s full-power punch didn’t dent it. He worked out that the casters had accepted a risk (staying outside, where they were easy to find) in exchange for strength. Yuji, Megumi and Ino then found them on the roof and broke the stakes (Ch. 94–98, Episodes 35–36).

Domain Expansion vs Simple Domain vs Hollow Wicker Basket

Domain Expansion is called the pinnacle of jujutsu, and it is a barrier technique. The user builds their innate domain inside a barrier and imbues that barrier with their cursed technique, so every attack inside is guaranteed to hit (Ch. 15, Episode 7). For the full list of domains, see our JJK Domain Expansions guide.

The anti-domain techniques work by attacking that imbued barrier:

	Domain Expansion	Simple Domain	Hollow Wicker Basket
What it is	Innate domain + technique inside a closed barrier	Small domain around the user with programmed rules	Woven, basket-like shield from interlocked hands
Main effect	Sure-hit (often sure-kill) inside	Nullifies a domain’s sure-hit in its range	Nullifies a domain’s sure-hit
Weakness	Huge cursed energy cost; technique burns out afterward	Weaker output; strong domains break it quickly	Doesn’t stop attacks that aren’t the sure-hit (e.g. Megumi’s incomplete domain)
Origin	—	New Shadow Style, founded by Sadatsuna Ashiya in the Heian era	The older technique Simple Domain was based on
First shown	Ch. 15	Ch. 35 (Miwa)	Ch. 171 (Reggie)

Only Sukuna and Kenjaku can expand a lethal domain without closing the barrier. The characters compare it to painting without a canvas (Ch. 119, Ch. 206, Ch. 225).

Barrier strength inside vs outside (Ch. 225)

Domain barriers are normally reinforced from the inside. That makes them almost impossible to escape. The catch: the more a barrier is reinforced from the inside, the weaker it is against attacks from the outside (Ch. 109).

The Gojo vs Sukuna fight turns this into the key moment. In Chapter 225, both expand their domains at the same time. Unlimited Void and Malevolent Shrine are equally refined, so their sure-hits cancel out inside Gojo’s barrier. But Malevolent Shrine has no barrier of its own, and its range reaches outside Gojo’s. Sukuna slices Gojo’s barrier apart from the outside, and the sure-hit slashes reach Gojo (Ch. 225–226). Gojo survives by switching to Simple Domain and Reverse Cursed Technique until he can reset his burnt-out technique (Ch. 226).

For why Gojo’s Six Eyes still mattered in that clash, see our Six Eyes guide.

Tengen’s barriers: Jujutsu High and the nationwide network

Tengen is the strongest barrier user in the series and stays in the Tombs of the Star Corridor under Tokyo Jujutsu High. Tengen’s barriers come in layers:

Jujutsu High barriers. They change the campus layout every day to hide the schools. They are good at hiding but not at stopping intruders who already know where the school is (Ch. 53, Episode 21). In the Hidden Inventory arc, Gojo turns off his Infinity once the group passes the torii into the barrier, and Toji stabs him there (Ch. 70, Episode 27).
Concealing barriers. Over a thousand shuffling doors guard the path to the Tombs of the Star, and Tengen’s own chamber admits only invited people (Ch. 53, Ch. 72).
Empty barriers. Vacant spaces with hexagonal walls above the Tombs. Tengen used them against Kenjaku, erasing one to break his domain (Ch. 206).
Pure barriers. A nationwide network that suppresses curses and improves the barrier techniques of Jujutsu High managers. Four are critical: the Imperial Palace, the Tombs of the Star, the Yamakuni Mausoleum in Kyoto, and the Holy Mountain of Hida (Ch. 220).

Culling Game colony barriers

The Culling Game runs in ten colonies linked by barriers down the length of Japan. Hokkaido is left out because of the jujutsu society’s barrier there (Ch. 146, Episode 50).

Entry makes you a player. Anyone who isn’t a player becomes one the moment they enter a colony (Rule 3, Ch. 143, Episode 49).
Free will strengthens them. The colonies can hold players because the barriers are premised on players entering by choice (Ch. 146).
Phones don’t work. Yuta goes silent after entering, which tells the others the barriers block reception.
Bon barriers. The colonies sit on bon barriers, which are stronger than pure barriers and use Tengen’s pure barriers as their base. Kenjaku later threatened to destroy them to force Kogane to accept rules that would end the game (Ch. 220).

Tengen could have stopped the Culling Game by releasing the pure barriers, but that would have thrown away a thousand years of progress against curses (Ch. 220).

Prison Realm: a barrier in a box

The Prison Realm is a special grade cursed object, the remains of the monk Genshin, containing a living barrier that can seal anything. The target must stay within four meters of it for one minute in their own mind. Kenjaku got that minute by showing himself to Gojo in Geto’s body (Ch. 90, Episode 33). “Gate close” seals the target, and inside, time doesn’t pass (Ch. 91, Episode 34).

FAQ

What is the Curtain (veil) chant in Jujutsu Kaisen?

“Yami yori idete yami yori kuroku sono kegare o misogiharae”, given on the fan wiki as “Emerge from the darkness, blacker than darkness. Purify that which is impure.” Ijichi says it in Chapter 6 (Episode 4).

Is a Curtain the same as a veil?

Yes. Both names refer to the same barrier (帳, tobari). The fan wiki uses “Curtain” and lists “Veil” as an alternate name.

How did the curtain keep Gojo out?

At the Goodwill Event, Juzo Kumiya used a Curtain commissioned by Kenjaku that repelled only Gojo, in exchange for letting everyone else in freely (Chapter 45, Episode 18).

Is Domain Expansion a barrier technique?

Yes. It builds the user’s innate domain inside a barrier imbued with their cursed technique, which makes attacks inside guaranteed to hit. Simple Domain and Hollow Wicker Basket counter it by neutralizing that imbued barrier.

What barriers does Tengen maintain?

The Jujutsu High barriers that hide the schools, concealing barriers around the Tombs of the Star, and a nationwide network of pure barriers. The Culling Game colonies are bon barriers built on top of those pure barriers (Chapter 220).

More Jujutsu Kaisen guides

This guide is the English edition of a BuzzBeaver article originally written in Japanese: 日本語版を読む. Facts are checked against the official manga and anime; fan theories are labeled as such.