The article highlights the challenge Japan faces with the unauthorized export of its premium fruit varieties and high-quality agricultural products, despite efforts to curb this issue through the amendment of the Plant Variety and Seed Protection Act. Despite these efforts, once these varieties are smuggled out, they can be clandestinely cultivated in other countries. To combat this, the Japanese government is increasing its support to Japanese growers by granting subsidies for the registration of Japanese varieties in other countries. The example of the Ruby Roman grape variety from Ishikawa Prefecture, which has been grown in South Korea, underscores the issue of unauthorized export and the challenge of protecting premium Japanese fruit brands, especially from countries with a similar climate to Japan.