Japan wants to halt China’s expansionism in the South China Sea and clearly sees security cooperation with Indonesia as an opportunity to further that aim. Indonesia has shown itself open to Japan's good will in assisting with security, indicating mutual enthusiasm. Furthermore, Indonesia also shares goals with Japan regarding the South China Sea. Both believe that no country should violate international maritime law.
And yet, even on the same issue, the two countries have quite different approaches to addressing China’s violations. Indonesia prefers to take a less confrontational stance to Japan to counter China.
In its 2023 Defence White Paper, Japan categorised China's “current external stance, military activities, and other activities” as “unprecedented and the greatest strategic challenge”, describing China as a figure that worries, and potentially threatens, Tokyo.
Indonesia does not dare to use such assertive language. Even in response to China’s 2023 publication of a new map that claimed most of the South China Sea and crashed into the archipelago nation’s exclusive economic zone, the Indonesian government released a statement declaring only that “any claims made must be in accordance with UNCLOS 1982”. Unlike Japan, little has been said publicly by Indonesia to specifically identify China as a challenge.
The differing approaches could be read as Indonesia and Japan not being entirely in agreement when it comes to defence matters. This divergence is also mirrored in the economic realm. Indonesia chose China as the developer of the Jakarta Bandung Fast Train (KCJB) mega-project for example, and China has made huge investments in the Indonesian nickel downstream mega-project in Indonesia Morowali Industrial Park (IMIP) and the glass production mega-project in Rempang Eco City.
Moreover, following the 14 February election, the direction adopted by Prabowo Subianto is still to be gauged. Prabowo, an ex-military man, has prompted fears about a redux of Suharto-style authoritarianism, with Indonesia’s democracy to suffer as a consequence. Even if such fears are not realised, the “like-minded” attitude Japan likes to highlight at least carries a further question mark.
These issues cumulatively pose fundamental challenges to the perception of Japan and Indonesia being on the same page in defence, economics and politics.