Since the formal establishment of diplomatic relations in 1887, Japan and Thailand have built one of the most enduring and multifaceted partnerships in Asia, one grounded in mutual respect, economic interdependence, and a shared vision for regional stability. As the two nations approach the landmark 140th anniversary of their diplomatic ties in 2027, the relationship stands at a defining moment, with new frontiers of cooperation emerging in areas ranging from advanced technology and renewable energy to cultural exchange and human capital development.

In this interview with Bridges Magazine, H.E. Ambassador Otaka offers his perspective on the evolving nature of Japan–Thailand relations, the opportunities and challenges that lie ahead, and the values that have long underpinned this exceptional bilateral partnership.

Bridges: How do you view the current state and future direction of Japan–Thailand relations as we approach the 140th anniversary?

Masato Otaka: Since the formal establishment of diplomatic relations in 1887, Japan and Thailand have supported, cooperated, and conducted exchanges with each other in many fields, including economy, trade, culture, education, science and technology.

Japan’s cumulative investment in Thailand has reached 4 trillion baht, accounting for approximately 40% of total foreign direct investment in Thailand, ranking first among all countries. Currently, around 6,000 Japanese companies operate in Thailand, alongside roughly 6,000 Japanese restaurants that serve both Thai and international customers.

Japan and Thailand will continue the efforts to further strengthen longstanding friendship. Looking ahead to the 140th anniversary of the establishment of diplomatic relations between Japan and Thailand in 2027, I hope that we will join hands to further deepen economic development, regional peace, and the bonds between people, forging a new era together.

In which areas do you see the greatest opportunities for deeper cooperation between our two countries?

One of my main areas of focus has been the evolving nature of Japan–Thailand economic relations. Our relationship has progressed well beyond traditional flows of trade and investment; it has matured into a partnership in which both countries can grow together. For decades, Japan has been Thailand’s largest foreign investor, contributing to a broad range of sectors including automobile manufacturing, infrastructure, finance, and services.

In recent years, however, Japan has at times been surpassed by other economies in terms of annual investment value, despite the continued strong interest of Japanese companies in the Thai market. At the same time, Thailand has been working to overcome the so-called middle-income trap, and its economic growth has occasionally faced headwinds. Against this backdrop, I believe it is essential for Japan and Thailand to deepen cooperation in areas where both countries hold distinct strengths—such as AI, the bioeconomy, environmental and renewable energy technologies, and space-related industries. By doing so, we can jointly build resilient supply chains that are better equipped to respond to global trends.

How can business, culture, and people-to-people exchange further strengthen bilateral ties in the coming years?

From an economic perspective, Japan and Thailand have also built an exceptionally strong partnership over many years. Thailand has set the goal of achieving carbon neutrality by 2050 and is advancing the Bio-Circular-Green (BCG) Economy. Japan stands ready to support Thailand in this journey by sharing our knowledge and experiences and working together to promote a successful green transition. At the same time, Thailand and Japan both face common challenges such as declining birthrates, aging populations, and climate change. Going forward, Japan and Thailand will share their respective experiences and strengths to jointly address these challenges and contribute to sustainable development.

Meanwhile, cultural exchanges between the two countries have successfully enhanced mutual understanding and familiarity. Moving beyond traditional exchange, co-creation emphasizes joint production through collaborative projects in creative industries, such as co-produced films and joint design showcases. By working together to create cultural content, our two countries can cultivate a stronger partnership built on equality and mutual respect.

Lastly, people-to-people exchanges between the two countries are also progressing steadily. In recent years, Thai travelers to Japan have consistently ranked first among all ASEAN countries. Exchanges through culture, tourism, sports, and food play an important role beyond the economic sphere, deepening mutual understanding and trust among our people. I am confident that such exchanges will lead to a more prosperous and enriching future.

What message would you like to share with Japanese and Thai stakeholders looking toward the next chapter of this partnership?

Next year, Japan and Thailand will mark the 140th anniversary of the establishment of diplomatic relations. For decades, our relationship has been built on trust, economic interdependence, and cultural affinity. Amid the rapidly changing global environment, characterized by geopolitical uncertainty, technological transformation, demographic shifts, and climate challenges, we would like to continue working closely with our long-standing friends to cooperate on various issues and to further strengthen Japan-Thailand relations.

The strength of Japan–Thailand relations has always been its people. The dedication and contributions of all those engaged in this partnership, in whatever capacity, are truly invaluable. If we continue to build on equality, mutual respect, and shared ambition, the next chapter of our relationship will not simply be an extension of the past, but rather a model of resilient, sustainable cooperation in the region and beyond.