Amid intensifying geopolitical rivalry between the United States and China, one country has quietly consolidated its position as the most trusted power in Southeast Asia: Japan.
An annual survey by the ISEAS–Yusof Ishak Institute, released on April 7, 2025 and based on responses from 2,008 participants across all ASEAN member states, found that Japan achieved a trust rating of 65.6 percent.
This figure significantly surpasses the European Union at 55.9 percent, the United States at 44 percent, China at 39.8 percent, and India at 38.5 percent.
Who Trusts Japan the Most and Why
Trust in Japan across Southeast Asia is uneven, with the highest levels in the Philippines (77.3%), followed by Brunei (72.9%), Cambodia (72.0%), and Vietnam (67.9%). This pattern reflects geopolitical realities rather than coincidence.
The Philippines and Vietnam face direct pressure from China in the South China Sea, from maritime clashes in Manila’s case to resource blockades for Hanoi. In response, Japan has positioned itself as a reliable security partner, offering tangible support without demanding explicit returns.
Since 2023, its Official Security Assistance program has expanded to countries including the Philippines, Malaysia, Indonesia, Thailand, and Vietnam, strengthening defense capacity among “like-minded” developing countries.
Cambodia presents a particularly interesting case. Despite Phnom Penh deepening ties with Beijing, trust in Japan remains high, driven by long-term investment. By 2022, Japan had committed over 622 billion yen (around 3.9 billion US dollars) to post-conflict reconstruction, infrastructure, and economic development.
Indonesia stands out as a notable exception. Trust in Japan dropped sharply from 61.5 percent in 2025 to just 47.9 percent this year.
Indonesia, however, marks a sharp exception. Trust fell from 61.5 percent in 2025 to 47.9 percent this year. This reflects Jakarta’s non-aligned stance and growing unease over Japan’s closer security alignment with the United States, which raises doubts about Tokyo’s independence.
Economic dynamics add to the shift. China’s expanding role in Indonesia’s green energy transition, from EV batteries to renewable energy, contrasts with Japan’s more limited presence, feeding perceptions of insufficient engagement.
Even among skeptics, criticism is less about hostility than absence: 38.3 percent believe Japan is too focused on domestic issues and Northeast Asia.
In the end, Japan remains the region’s most trusted partner not because trust is universal, but because it is still seen as consistent, reliable, and largely non-coercive where it matters most.
Japan’s Long-Built Regional Trust
The trust Japan enjoys today did not emerge overnight. It has been built since the 1970s through consistent engagement, especially as both China and the United States are increasingly seen as pursuing their own strategic interests.
A key turning point was the Fukuda Doctrine, announced by Takeo Fukuda in 1977. Japan pledged to act as a peaceful partner to ASEAN and renounced any return to militarism.
This commitment was reinforced by decades of development aid, totaling around 128 billion US dollars, focused on infrastructure, post-conflict recovery, and social development.
Unlike China, often criticized for debt-driven projects, or the United States, frequently linked to political pressure, Japan’s approach has been viewed as respectful of national sovereignty. This has made it a dependable partner, particularly for Southeast Asian countries seeking support without conditions.
Over time, this steady diplomacy has helped shift perceptions away from the painful legacy of World War II, including the Manila Massacre and the Burma Railway, toward a more pragmatic and forward-looking trust.
However, that trust is now being tested. Plans to revise Article 9 of the Japanese Constitution under the Liberal Democratic Party, led by Sanae Takaichi, along with increased defense spending to 2 percent of GDP by 2027 and military deployments near Taiwan, have raised concerns in the region.
Analysts warn that Japan must remain transparent about its intentions and ensure its defense buildup strengthens regional stability, rather than weakening the trust it has spent decades building.
