Japan, Vietnam Weigh Pact on Reporting Detained Nationals
Tokyo and Hanoi are considering a mutual arrangement to report arrests of each other's citizens amid rising cases involving Vietnamese nationals in Japan.
Updated on Nov. 3, 2026 in Immigration
Live Poll
Should countries share arrest information about their citizens abroad without the person's consent?
Japan and Vietnam are considering a pact that would allow each country to report arrests and detentions of the other's nationals, even without the individual's consent. The planned arrangement comes as Vietnamese leader To Lam prepares to visit Japan for four days, with Prime Minister Sanae Takaichi expected to meet him.
Why it matters
The pact is aimed at strengthening deterrence as crimes involving Vietnamese nationals in Japan have increased. It would depart from the Vienna Convention on Consular Relations, which generally requires an individual's consent before an arrest or detention is reported.
Japan's National Police Agency recorded 10,773 cases involving Vietnamese nationals in 2025, about 11 percent more than the prior year and over 40 percent of all foreigner cases excluding permanent residents. The categories of incidents covered by any future reporting arrangement have not yet been specified.
The players
Sanae Takaichi
Japan's prime minister, who is scheduled to meet Vietnamese leader To Lam to confirm the planned reporting pact.
To Lam
General Secretary of the Communist Party of Vietnam, who is slated to visit Japan for four days and meet Takaichi.
National Police Agency
Japan's national police agency, which recorded the 10,773 cases involving Vietnamese nationals in 2025.
The details
Under the proposal, arrests or detentions would be reported to the individual's home country without that person's consent, a step that differs from the Vienna Convention's usual requirement. Japan already has similar reporting arrangements with the United States, Britain, China and the former Soviet Union, and a Japan-Soviet consular treaty allows a right to seek reporting within three days of arrest.
Timeline
May: Leaders in Hanoi agreed to strengthen consular affairs cooperation.
Oct. 13: A Japanese reporter was detained by Russian authorities on espionage suspicion.
Sunday: Vietnamese leader To Lam begins a four-day visit to Japan.
Monday next week: Takaichi and To Lam are scheduled to meet and are expected to confirm the planned pact.
Two to three years from the agreement: The pact would take at least that long before taking effect.
Legal Context
The proposal would bypass the consent requirement of the Vienna Convention on Consular Relations, a departure that echoes Japan's earlier reporting treaties with the United States, Britain, China and the former Soviet Union. Its aim of deterring crime by foreign nationals places it within Japan's ongoing debate over how to handle rising cases involving foreign residents.
If adopted, the pact would allow Japanese authorities to notify Vietnam of arrests of its citizens without their consent, affecting Vietnamese nationals living or working in Japan. The arrangement would not take effect for at least two or three years.
The takeaway
Bilateral consular agreements can reshape how arrests of foreign nationals are reported, and proposals that set aside individual consent deserve close attention as they are negotiated.
What happens next
Takaichi and To Lam are scheduled to meet on Monday next week to confirm the planned pact, and the two leaders are expected to discuss its details at that time.
Further reading
For broader background on how foreign nationals are handled, see Immigration coverage.
Live Poll
Should countries share arrest information about their citizens abroad without the person's consent?
