In an increasingly fractured global technological landscape, marked by escalating rivalry between China and the United States and a growing trend towards technological bifurcation, Japan and the Association of Southeast Asian Nations (ASEAN) are proposing a collaborative approach to the development of Artificial Intelligence (AI). The core of this initiative lies in the concept of "co-creating" AI models, emphasizing inclusivity and shared development. This vision emerges against a backdrop where major global powers are increasingly vying for dominance in AI research and application, potentially leading to divergent technological ecosystems and standards. Japan, a nation with advanced technological capabilities and a strong focus on ethical AI development, sees an opportunity to partner with ASEAN, a dynamic bloc of ten Southeast Asian countries, to foster a more balanced and equitable AI future. The rationale behind this collaboration is multifaceted. Firstly, it aims to counter the potential negative consequences of a Sino-US AI arms race, which could leave smaller nations behind or force them to align with one bloc over the other. By "co-creating" AI, Japan and ASEAN intend to develop models that are not only technologically sophisticated but also reflect the diverse needs, values, and cultural contexts of the region. This inclusive approach is crucial for ensuring that AI development benefits a wider population and does not exacerbate existing inequalities. Secondly, the partnership seeks to promote technological sovereignty and reduce reliance on a few dominant players. By pooling resources, expertise, and data, Japan and ASEAN can enhance their collective capacity to innovate and develop AI solutions tailored to their specific challenges, such as disaster management, healthcare, and sustainable development. The emphasis on inclusivity also extends to the ethical considerations of AI. As AI technologies become more pervasive, concerns about bias, privacy, and accountability are paramount. A co-creation model allows for a broader range of perspectives to be incorporated into the design and deployment of AI systems, potentially leading to more robust and trustworthy AI. Furthermore, this collaboration could foster a more multipolar global order in AI, where diverse perspectives and approaches are valued, rather than a landscape dominated by a few technological superpowers. The success of this initiative will depend on effective knowledge sharing, joint research projects, and the establishment of common standards and frameworks for AI development and governance within the Japan-ASEAN partnership. It represents a forward-thinking strategy to navigate the complex and rapidly evolving world of artificial intelligence, aiming for a future where AI serves humanity inclusively and equitably.