Yes, in most places around the world you can legally own a sword. However, laws can vary significantly depending on your location

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• In the United States, most states allow the ownership of swords without any specific restrictions. However, it's essential to check with local and state laws, as some may have limitations on the type or size of the sword, or restrictions on displaying or carrying the sword in public.
• In the United Kingdom, you can own certain types of swords. However, there are restrictions on swords with a curved blade of 50cm or more, unless they're handmade using traditional forging methods, are antiques, or have a specific religious, martial arts, or re-enactment use.
• In Australia, laws vary by state, but in general, it's legal to own a sword. Some states may require a permit, especially if the sword is to be displayed in a public place.
• In Japan, swords that are considered nihonto (traditional Japanese swords) are national treasures, and owning one requires special permission from the government. These swords must also be registered with the local Board of Education.

Remember, laws and regulations can change, and there may be additional local ordinances or rules that apply, so it's always best to check for the most current information in your specific area.