Thailand Deepens Ties with Singapore, Indonesia Amid ASEAN Cooperation Push

Thailand has seen considerable progress in its relationships with Singapore and Indonesia in recent years. This presents an opportune moment to reflect on the low-friction dynamics with these neighbors, given mounting global supply chain risks and the Thai government's pursuit of a more proactive foreign policy. Thailand and Singapore pledged greater cooperation on energy and food security, digital and physical connectivity, and regional strategic matters during the fifth Thailand-Singapore Leaders’ Retreat, held for the first time in 11 years. Their defense cooperation is particularly robust within ASEAN, including joint military exercises and Singapore Armed Forces training space in Thailand. Thailand remains a valuable training ground for Singapore's military, allowing for extensive maneuvers without the need to carefully manage political sensitivities in the region. Thailand has also procured strategic assets such as F-16 fighter jets and amphibious assault ships from Singapore, indicating high confidence in Singapore's defense standards. Thailand is leveraging its traditional manufacturing strengths and pivoting toward high-value industries. Foreign direct investment from Singapore is the largest among ASEAN nations, accounting for 25.5% of Thailand's total foreign direct investment, surpassing Japan, its long-standing top investor. Meanwhile, ties between Thailand and Indonesia have also gained momentum since 2025. The two countries held their first-ever Leaders’ Consultation and elevated their relationship to a Strategic Partnership. A recent visit by the Thai Prime Minister to Indonesia covered topics such as the halal supply chain, carbon market cooperation, and tourism. The repatriation of nearly 1,000 Indonesian nationals who fell victim to scam operations was also highlighted as a specific political and security issue. Thailand has become one of ASEAN's biggest outward investors due to factors such as ample corporate cash reserves, currency stability, and slow domestic growth stemming from demographic decline. Indonesia, with its large population, is an attractive investment destination for Thai companies. Thailand has also placed the development of the global Muslim consumer market, with its massive growth potential, on its national agenda. However, in trade and investment, Thailand and Indonesia are competitors, targeting the same international investors and industries, notably vehicle manufacturing. The narrative in Thailand these days suggests the country is being forced to choose between retaining its status as a regional automotive hub or making way for the rise of Chinese electric vehicles. Source: The Diplomat Indonesia