The legality of owning a samurai sword, including a functional or antique one, can vary depending on the specific laws and regulations of the country, state, or local jurisdiction where you reside. It is important to familiarize yourself with the laws pertaining to sword ownership, possession, and display in your specific area.

In many places, it is generally legal to own a samurai sword as long as it is used for decorative purposes, display, or as part of a collection. However, laws may restrict carrying or using such swords in public or as weapons. Some jurisdictions may have specific requirements regarding blade length, construction materials, or the manner in which the swords are displayed or sold.

It's important to note that laws and regulations can change over time, and they can also vary significantly between different countries and regions. Therefore, it is advisable to consult your local law enforcement agency, legal authorities, or relevant government agencies to obtain accurate and up-to-date information regarding the specific regulations governing the ownership of samurai swords in your area.

It is always recommended to comply with the laws and regulations of your jurisdiction and to use swords responsibly and safely, whether they are functional, replica, or decorative pieces.