Relationship dossier
Indonesia
Japan
Relationship assessment
A broad strategic partnership grounded in economic ties, infrastructure cooperation and expanding defense engagement
Indonesia toward Japan
+60Indonesia participates in the bilateral Economic Partnership Agreement with Japan and has developed government-to-government cooperation on infrastructure, maritime affairs and defense. In 2023, Indonesia joined Japan in elevating the relationship to a Comprehensive Strategic Partnership.
Japan toward Indonesia
+60Japan has supported Indonesian infrastructure projects through government-backed financing and development cooperation, including projects such as Jakarta's MRT. Japan and Indonesia established an Economic Partnership Agreement in 2008 and have expanded government cooperation on maritime and defense matters; the relationship was elevated to a Comprehensive Strategic Partnership in 2023.
Overall relationship
+60The relationship has durable economic and institutional foundations, including the bilateral Economic Partnership Agreement, Japanese-backed infrastructure cooperation and an expanding strategic and defense partnership. These substantial areas of cooperation outweigh historical strain associated with Japan's wartime occupation of Indonesia.
How to read these scores
Scores are rough judgments, not objective measurements or current verification. Directional scores describe government policy and conduct, not public opinion. The overall score is an independent estimate, never an average.
- −100
- Extreme sustained hostility
- −50
- Substantially adversarial
- 0
- Mixed or neutral, supported by knowledge
- +50
- Substantially cooperative
- +100
- Exceptionally close sustained partnership
“Not assessed” means there is no recorded score. Pair existence makes no claim about diplomatic recognition or established relations.
Relationship context
Overview
Indonesia and Japan maintain a broad strategic partnership spanning trade, development, infrastructure and defense. The 2008 bilateral Economic Partnership Agreement and Japan-backed infrastructure projects in Indonesia provide durable economic foundations. The governments elevated ties to a Comprehensive Strategic Partnership in 2023 and have expanded defense and maritime cooperation. World War II occupation remains part of the historical context, but no specific current bilateral dispute is identified here.
Key developments
The Indonesia-Japan Economic Partnership Agreement entered into force, creating a framework for bilateral economic cooperation.
The governments elevated bilateral relations to a Comprehensive Strategic Partnership.
Major uncertainties
- The extent and implementation of recent defense and maritime cooperation are unclear.
- The scale of current Japanese development assistance and infrastructure commitments is not detailed here.