Central Asia–Japan Leaders’ Summit in Tokyo Backs Trans-Caspian Corridor; Tokayev Warns Nuclear Risks Are Rising

“Central Asia plus Japan Dialogue” (CA+JAD). Credit: Prime Minister’s Office of Japan

By Katsuhiro Asagiri
TOKYO, Japan, Dec 22 2025 (IPS)

Leaders of Japan and the five Central Asian states met in Tokyo on Dec. 20 and adopted the “Tokyo Declaration,” launching a new leaders-level format under the “Central Asia plus Japan Dialogue” (CA+JAD). The declaration places at the core of cooperation two priorities: strengthening supply-chain resilience for critical minerals, and supporting the Trans-Caspian Corridor (the Trans-Caspian International Transport Route), which links Central Asia with Europe without transiting Russia.

Chaired by Prime Minister Sanae Takaichi, the meeting reflected Central Asia’s strategic importance as a Eurasian crossroads and as a region with mineral resources essential to decarbonization and advanced industries. As major powers step up engagement across the region, Central Asia’s weight as a stage for diplomacy and trade has been growing.

The Japanese government emphasized a practical, implementation-oriented approach—translating cooperation into deliverable projects. For Central Asian countries, the Trans-Caspian Corridor is also a means to expand transport options and reduce dependence on any single transit route. It can help attract investment for modernizing ports, railways and customs systems, while increasing opportunities to capture transit and logistics revenues.

For Japan, corridor development and cooperation on minerals serve as a form of risk diversification in economic security. By diversifying both procurement sources and transport routes for critical minerals—such as rare earths and lithium—needed for batteries, renewable energy technologies and electronic devices, Japan aims to prepare for heightened geopolitical risk. There is also a clear intent to expand opportunities for Japanese companies to participate in infrastructure, logistics and digital sectors.

Japan–Kazakhstan Joint Statement as the Anchor

Ahead of the leaders’ summit, Kazakhstan’s President Kassym-Jomart Tokayev paid an official visit to Japan, with a series of diplomatic engagements scheduled around the trip.

On Dec. 18, Prime Minister Takaichi and President Tokayev held a summit meeting and issued a joint statement on a “future-oriented expanded strategic partnership.” The statement reaffirmed a rules-based international order grounded in the principles of the U.N. Charter, and the two leaders agreed to advance cooperation through concrete initiatives in areas including critical minerals, the energy transition, and transport and logistics connectivity.

On the Trans-Caspian Corridor, the joint statement specified practical measures aimed at easing customs and port bottlenecks—such as training for customs officials in cooperation with the World Customs Organization (WCO) and support for improving cargo inspection scanners (cargo inspection equipment) at Aktau Port in western Kazakhstan. The two leaders also welcomed plans to launch regular direct flights in 2026 and agreed to begin intergovernmental negotiations toward the conclusion of a bilateral air services agreement. In addition, the joint statement expressed an intent to exchange information and explore potential avenues of cooperation with the “UN Regional Centre for the SDGs for Central Asia and Afghanistan”, which was established in Almaty.

Tokayev Warns of Nuclear Risks in Tokyo

On the following day, Dec. 19, President Tokayev delivered a lecture at the United Nations University in Tokyo, warning that “nuclear risks are rising again.”

Kassym-Jomart Tokayev delivered a lecture at the United Nations University

He referred not only to the atomic bombings of Hiroshima and Nagasaki but also to Kazakhstan’s Semipalatinsk nuclear test site, where the former Soviet Union conducted more than 450 nuclear tests, arguing that both Japan and Kazakhstan are countries that know the devastating consequences wrought by nuclear weapons. He said practical steps must be steadily accumulated to advance nuclear disarmament and reduce nuclear risks.

Tokayev also cited Kazakhstan’s decision to relinquish the nuclear weapons left on its territory after the Soviet collapse, suggesting that security should not depend solely on nuclear deterrence.

Kazakhstan has, around Aug. 29—the date the Semipalatinsk test site was closed and also the U.N.-designated International Day against Nuclear Tests—hosted meetings in Astana that foreground the inhumane impacts of nuclear weapons and call for strengthening norms underpinning the Central Asian Nuclear-Weapon-Free Zone. These gatherings have included participation by civil society groups such as the International Campaign to Abolish Nuclear Weapons (ICAN) and Soka Gakkai International (SGI).

Three Priority Areas: Resilience, Connectivity, Human Development

At the Dec. 20 summit, President Tokayev attended alongside the presidents of Kyrgyzstan, Uzbekistan, Tajikistan and Turkmenistan. Prime Minister Takaichi noted that Central Asia’s growing population and rapid economic expansion have raised the region’s international profile, and stressed the importance of regional cooperation and engagement with external partners.

Japan announced the “CA+JAD Tokyo Initiative,” setting out three priority areas for cooperation: (1) green and resilience (including the energy transition, disaster risk reduction and supply-chain resilience for critical minerals); (2) connectivity (including the Trans-Caspian Corridor and A.I. cooperation); and (3) human development (including scholarship programs and cooperation in health and medical fields).

The Tokyo Declaration also explicitly set out the launch of the “Japan–Central Asia Partnership for AI Cooperation,” with a view to applying A.I. to resource development and related areas. More than 150 documents were signed and announced by public and private stakeholders on the margins of the meeting, and a goal was presented to develop business projects totaling 3 trillion yen over the next five years.

Multipolar Engagement and Kazakhstan’s “Multi-Vector” Diplomacy

The Tokyo gathering also underscored the reality of accelerating summit diplomacy around Central Asia. China convened a leaders’ meeting with the five Central Asian states in Kazakhstan earlier this year, and the United States invited the same five leaders to Washington in November.

Kazakhstan, in particular, has long pursued a “multi-vector” foreign policy—cultivating relations in parallel with competing major powers to preserve sovereignty and strategic options. The Tokyo agreements—combining diversification of transport corridors, expanded cooperation on minerals and technology, and the use of development cooperation through international institutions—align with this balancing strategy.

For Japan, the new leaders-level format provides a means to deepen engagement with Central Asia by connecting resources, logistics and technology. For President Tokayev, the visit also served as a platform to argue that, as nuclear risks re-emerge at the forefront, Eurasia’s economic future cannot be separated from the security challenges that shape it.

INPS Japan

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IPS UN Bureau