The price of a Japanese katana can vary significantly depending on several factors, including the sword's age, craftsmanship, condition, authenticity, historical significance, provenance, and the demand among collectors and enthusiasts.

Authentic antique katana swords made by renowned swordsmiths can be quite valuable and can range from several thousand dollars to hundreds of thousands of dollars or more, depending on their attributes and rarity. The value of such swords is often driven by their historical importance, craftsmanship, and cultural significance.

Modern, newly made katana swords crafted by skilled swordsmiths or reputable manufacturers can also vary in price. Custom-made or high-quality production katana swords can range from a few hundred to several thousand dollars, depending on factors such as the materials used, level of craftsmanship, and reputation of the maker.

It's important to note that the market for katana swords can be complex and specialized. Determining the price of a specific katana often requires the expertise of professionals, such as sword appraisers or experts in Japanese sword collecting. They consider various aspects, including the sword's signature (mei), tang (nakago) markings, blade condition, and historical documentation when evaluating its worth.

If you are interested in purchasing a Japanese katana, it is advisable to consult with reputable experts or specialized dealers in Japanese swords who can provide accurate pricing, guidance, and access to authentic and high-quality swords based on their knowledge and experience in the field.