Yes, it is possible to purchase a real Japanese katana. However, due to their historical and cultural significance, as well as their potential value as collectibles, acquiring an authentic and legally obtained Japanese katana requires careful consideration and adherence to certain regulations.

There are reputable dealers, specialized sword shops, and even online platforms that offer authentic Japanese katana for sale. These sources often work closely with swordsmiths, collectors, or experts in the field to ensure the authenticity and quality of the swords they sell.

When looking to purchase a Japanese katana, it is crucial to conduct thorough research and exercise caution. Here are a few points to keep in mind:

1. Legality and Regulations: Different countries have varying regulations regarding the ownership, sale, and import/export of swords, including Japanese katana. Ensure that you understand and comply with the applicable laws and regulations in your region.
2. Reputation and Expertise: Seek out reputable dealers, shops, or individuals with a strong track record and expertise in Japanese swords. Look for those who have established relationships with recognized swordsmiths or organizations dedicated to preserving the art of sword-making.
3. Authentication and Documentation: Authenticity is paramount when purchasing a Japanese katana. Request proper documentation, such as certificates of authenticity, provenance, or appraisals from knowledgeable experts or organizations. These documents help establish the sword's authenticity and provide important information about its history.
4. Personal Inspection: If possible, inspect the katana in person or request detailed photographs and descriptions. Look for signs of quality craftsmanship, examine the blade, fittings, and overall condition of the sword. If you lack expertise, consider consulting with a trusted sword appraiser or knowledgeable collector to evaluate the sword on your behalf.

Remember, acquiring a genuine Japanese katana can be a significant investment, both financially and culturally. Take the time to educate yourself, seek expert advice, and ensure that you are making a well-informed and responsible purchase.