Representatives from the Republic of Korea, the United States and Japan met in Seoul on September 3-4 and in Tokyo on September 5 for two trilateral workshops on quantum industrial security. Recognizing the value of trilateral cooperation to strengthen and secure critical and emerging technologies, experts from government and industry met to share best practices and discuss how to protect our quantum ecosystems from physical, cyber, and intellectual property threats. Breakthroughs in quantum computing have the potential to reshape the global balance of power, spark entirely new industries, and revolutionize the way we live and work. These workshops highlighted the growing importance of trilateral cooperation in safeguarding innovation and strengthening the quantum ecosystem.