Relationship dossier
Japan
Taiwan
Relationship assessment
Substantial unofficial cooperation, constrained by competing territorial claims and the absence of formal diplomatic ties
Japan toward Taiwan
+30Japan has maintained practical unofficial channels with Taiwan and donated COVID-19 vaccines to it. The 2013 fisheries agreement established arrangements for fishing in parts of a contested East China Sea area, while Japan’s formal recognition of the People’s Republic of China limits official relations with Taiwan.
Taiwan toward Japan
+30Taiwan provided pandemic-related assistance to Japan, including masks. The 2013 fisheries agreement also created a practical framework for managing fishing activity in contested East China Sea waters.
Overall relationship
+30The relationship combines substantial unofficial engagement and practical cooperation, including fisheries arrangements and pandemic assistance, with constraints arising from the lack of formal diplomatic relations and competing claims over the Senkaku/Diaoyutai Islands. These features support a cooperative but qualified overall characterization.
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
Japan and Taiwan maintain substantial unofficial ties, with practical cooperation in fisheries and public health despite the absence of formal diplomatic relations. Japan has donated COVID-19 vaccines to Taiwan, while Taiwan provided pandemic-related assistance to Japan. Their relationship is constrained by competing sovereignty claims over the Senkaku/Diaoyutai Islands and by Japan’s formal diplomatic relationship with the People’s Republic of China.
Areas of tension
- Competing claims over the Senkaku/Diaoyutai Islands
- Japan’s formal diplomatic relationship with the People’s Republic of China and its implications for official ties with Taiwan
Key developments
Japan and Taiwan signed a fisheries agreement establishing arrangements for fishing in parts of a contested East China Sea area.
Japan donated COVID-19 vaccine doses to Taiwan.
Taiwan provided pandemic-related mask assistance to Japan.
Major uncertainties
- The scope and implementation of bilateral cooperation beyond fisheries and public-health assistance are unclear.
- The extent of ongoing government-to-government coordination on regional security is uncertain.