Hawaii Sword Laws

A katana on a wall in Honolulu, a longsword in a Hilo collector's display, a fantasy saber in a Kahului apartment. Hawaii sword laws are more permissive than many people realize, and the 2024 enactment of Act 21 made the state significantly more collector-friendly. Ownership of most blades is fully open. The strict piece is concealed carry of specific categories that Hawaii statute and case law treat as deadly weapons.

Hawaii sword laws live in Chapter 134 of the Hawaii Revised Statutes. The core provisions for blades are HRS § 134-51 (deadly weapons), § 134-52 (switchblade knives), § 134-53 (butterfly knives), and § 302A-1134.6 (zero tolerance policy in schools). Act 21 of 2024 rewrote large sections of §§ 134-52 and 134-53, removing ownership bans and narrowing the focus to concealed carry. This guide walks through what current Hawaii sword laws say and how they apply to traditional swords in 2026.

What do Hawaii sword laws actually say?

HRS § 134-51(a) makes it a misdemeanor for any person, not authorized by law, to knowingly carry concealed on the person, or in a bag or other container carried by the person, any dirk, dagger, blackjack, metal knuckles, or other deadly or dangerous weapon. The statute does not impose a categorical ownership ban on any of these items. It targets concealed carry on the person or in a carried bag.

Hawaii case law has interpreted "deadly or dangerous weapon" narrowly. In State v. Murray and related decisions, the Hawaii Supreme Court held that the phrase reaches instruments whose sole or primary design and purpose is to inflict bodily injury or death. Diver's knives, butterfly knives, kitchen knives, and cane knives have been held outside that definition in specific cases. Sheathed sword-canes and certain other clearly weapon-purposed items have been treated as deadly weapons. The line is fact-specific, and Hawaii sword laws turn on the design and purpose of the particular blade in question.

Is it legal to own a sword in Hawaii?

Yes. Hawaii sword laws do not restrict the ownership of ordinary swords. Katanas, longswords, sabers, machetes, rapiers, kukris, and fantasy replicas can all be purchased and kept in a private residence without a permit, registration, or background check. The state does not maintain a list of prohibited sword types, and ordinary ownership is fully legal.

Post-Act 21, ownership of switchblades, butterfly knives, and gravity knives is also legal in Hawaii. These categories were previously banned outright by §§ 134-52 and 134-53, but the 2024 amendments removed the manufacture, sale, possession, and transport prohibitions. What remains is a concealed-carry restriction for switchblades and butterfly knives, on the same general structure as the § 134-51 rule for dirks and daggers.

How do Hawaii sword laws handle open and concealed carry?

Open carry of most knives is legal at the state level under Hawaii sword laws. There is no statute that imposes a categorical ban on visibly carrying a sword on a belt, in a back-mounted scabbard, or in a hand. The post-2024 framework narrowed the carry-related offenses to concealment specifically, which left open carry largely unregulated for ordinary blades.

Concealed carry is where Hawaii sword laws become more restrictive. Three statutes apply:

• HRS § 134-51(a): concealed carry of dirks, daggers, or other deadly or dangerous weapons
• HRS § 134-52(a): concealed carry of switchblade knives
• HRS § 134-53(a): concealed carry of butterfly knives

All three are misdemeanors carrying up to one year of confinement. For a traditional sword like a katana, the relevant question is whether the blade fits within "dirk, dagger, or other deadly or dangerous weapon" for § 134-51 purposes. A katana hidden in a sword bag carried on the body or a wakizashi concealed under a coat could be argued either way depending on the specific blade and circumstances, but the safer assumption is that swords fall inside the deadly weapon category for purposes of this statute.

Hawaii lets you own almost anything. Keep the blade visible when you carry it.

What about the sheathed sword-cane case law?

Hawaii case law has specifically addressed sword-canes. The Hawaii Supreme Court has held that a sheathed sword-cane is a "deadly or dangerous weapon" for purposes of § 134-51. The reasoning is that the design and purpose of a sword-cane is to conceal a blade within an ordinary-looking walking stick for the purpose of producing a weapon when needed. That design intent puts the item squarely inside the deadly weapon category, even if a walking stick or kitchen knife of similar dimensions would not qualify.

For collectors who own or are considering sword-canes, this case law is the most important single feature of Hawaii sword laws. A sword-cane is legal to own at home, but carrying one in public is treated as carrying a concealed deadly weapon by definition. There is no clean lane for transport of a sword-cane outside a private residence in Hawaii.

Where can you not carry a sword in Hawaii?

HRS § 302A-1134.6 establishes a zero tolerance policy for weapons on school grounds, which is the strictest single feature of Hawaii sword laws. Possession of any weapon on the premises of a public or private school, college, or university is prohibited, with no general exceptions for licensed carriers. The penalty is administrative for students and criminal for others, and the policy covers any blade regardless of length or type.

Other restricted locations include:

• Courthouses and judicial facilities
• Correctional facilities, jails, and detention centers
• State and federal government buildings
• Hawaiian state parks where weapons are restricted by rule
• Public transit facilities and certain transportation hubs
• Secure areas of airports past TSA screening
• Private property where the owner has banned weapons

Hawaii does not have a general statewide knife preemption statute, and individual counties (Honolulu, Maui, Hawaii, Kauai) can adopt their own ordinances on weapons. Sword collectors should verify county-level rules in addition to the state framework before transporting a blade in public.

How should collectors transport swords across Hawaii?

The cleanest transport approach under Hawaii sword laws is visible packaging. A sword in a recognizable hard case, a katana in original manufacturer packaging, or a sheathed blade openly carried on a belt sit outside the concealed-carry prohibition because the blade or its packaging is visible rather than hidden. The statute targets blades concealed "on the person" or "in a bag or other container carried by the person," and a clearly marked sword case is not the same thing as a duffel.

For collectors heading to renaissance fairs, anime conventions, martial arts dojos, or knife shows in Hawaii, the practical path is to keep the sword visible during transport, leave sword-canes at home given the case law, and stay clear of schools, courthouses, and other restricted locations. Hawaii sword laws give plenty of room for ordinary collectors who keep transport visible and avoid the few categories the statute explicitly prohibits in concealment.

The bottom line on owning and carrying swords in Hawaii

Hawaii sword laws are friendlier than their reputation suggests, especially after Act 21 of 2024. Ownership of swords, switchblades, butterfly knives, and gravity knives is fully legal. Open carry is broadly permitted at the state level. The strict piece is concealed carry of dirks, daggers, switchblades, butterfly knives, and items that fall inside the "deadly or dangerous weapon" category by design and purpose, which includes sword-canes by case law.

For collectors building a sword collection in Hawaii, the practical takeaway is to display at home, keep transport visible rather than concealed, avoid sword-canes for public carry entirely, plan around the school and government building restrictions, and verify county ordinances before relying on the state framework alone. The post-Act 21 environment is workable, and Hawaii sword laws are no longer the outlier they once were.

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