A1 International Co., Ltd. is the Japanese arm of the Brilliant Group, expanding its operations across four countries: Japan, Vietnam, the Philippines, and Indonesia, in seven cities. Focused primarily on language education and study abroad initiatives, A1 International aims to enhance global communication capabilities and empower individuals to thrive on the international stage. Its signature offerings include the Brilliant Cebu English Academy in the Philippines, which caters to working adults seeking to improve their English skills, and additional language schools across ASEAN countries.

With a mission to "open up the possibilities," the brand emphasizes the importance of learning languages not just for students, but also for staff and instructors, promoting a culture of continuous growth and innovation. A1 International supports Japanese and Korean companies looking to expand in Southeast Asia while nurturing a rich spirit and professionalism within its community. Embedded in its philosophy is the understanding that effective communication transcends barriers, enabling greater collaboration in a globalized world.