Japan Completes Third JCM ITMO Issuance in Eight Months as Palau Solar Projects Yield 194 tCO2e

Japan’s Ministry of the Environment has completed its third round of Paris Agreement-aligned internationally transferred mitigation outcome (ITMO) issuances under the Joint Crediting Mechanism, drawing on four small-scale solar photovoltaic projects in the Pacific island state of Palau — bringing to three the number of bilateral JCM partners from which Japan has received ITMOs, all within an eight-month span.

On 2 June 2026, the Japanese government registered 194 tCO2eq of ITMOs into its account in the JCM national registry, following a formal electronic resolution by the Japan-Palau JCM Joint Committee on 16 May 2026 that set credit volumes for each of the four projects. The Palauan government subsequently authorized the international transfer of those credits from its own registry — a step required under Article 6.2 of the Paris Agreement to complete the bilateral transfer process.

All four underlying projects involve small-scale rooftop solar installations in Palau. Three deploy photovoltaic systems at commercial facilities and a school across island sites; the fourth introduces a 0.4 MW rooftop array at a supermarket and hotel. Credited volumes per project are: 64 tCO2eq for the first commercial-facilities scheme (Japan’s ITMO share: 32 tCO2eq); 24 tCO2eq for the schools scheme (Japan: 12); 68 tCO2eq for a second commercial-facilities scheme (Japan: 34); and 290 tCO2eq for the supermarket-and-hotel installation (Japan: 116). All credit periods fall within calendar year 2021 — approximately five years before the issuance date. Japan’s ITMO share is exactly half of total credited reductions in three of the four projects and approximately 40 percent in the fourth.

Japan established its JCM partnership with Palau in 2014, when the Pacific state became the tenth country to sign a Memorandum of Cooperation with Japan under the mechanism, while Paris Agreement negotiations were still ongoing. The JCM network has since grown to 32 partner countries with more than 300 active projects. This Palau issuance follows two earlier milestones: Thailand in November 2025 and the Maldives in December 2025.

The 194 tCO2eq will be counted toward Japan’s NDC, which targets FY2030. To avoid double-counting, the credits will be processed under corresponding adjustment procedures set by theas revised in March 2025, in line with decisions of the Conference of the Parties serving as the Meeting of the Parties to the Paris Agreement.

Background

The JCM is Japan’s bilateral mechanism for deploying clean technology and low-carbon infrastructure in partner countries while receiving a quantified share of resulting emissions reductions. Its linkage to Article 6.2 of the Paris Agreement requires corresponding adjustments — a formal accounting correction in which the host country adjusts its own NDC to avoid claiming the same reductions that Japan counts. The March 2025 revision to the corresponding adjustment procedures represents a maturing of the operational framework needed for Article 6.2-compliant issuance, and its use in this Palau case marks a further working-through of that architecture.

Palau’s electricity supply — typically reliant on diesel generation, as is common for remote Pacific island states — makes distributed solar deployment under JCM a natural fit for the partnership. The credit periods for these four projects all fall in 2021, reflecting early-vintage activity from a partnership in place since 2014. That the corresponding adjustment framework necessary to convert these credits into fully Paris-aligned ITMOs took several years to operationalize — through subsequent COP decisions after the Agreement’s 2015 adoption — explains much of the apparent lag. That groundwork now appears to be complete for these projects, at least.

Why It Matters

The 194 tCO2eq total is modest in absolute terms, but volume is not the primary measure of significance. What the Palau issuance demonstrates is a repeatable procedural cycle: JCM project crediting → Joint Committee approval → host-country transfer authorization → ITMO issuance into the Japanese national registry. Three completions of that full cycle — with three different bilateral partners across two geographic regions — in eight months suggests the pipeline has moved from pilot to operational mode.

For project developers active in JCM partner countries, the roughly five-year gap between 2021 credit periods and the June 2026 issuance is worth noting. That gap is partly a structural artefact of the Article 6.2 corresponding adjustment framework being operationalized only through successive COP decisions, rather than a permanent feature of JCM processing. Even so, developers planning forward project timelines should build realistic assumptions about vintage lag until more recent credits are seen flowing through to ITMO status at speed.

The scale challenge for Japan’s NDC remains the larger strategic question. With 32 partner countries and over 300 active projects in the JCM portfolio, 194 tCO2eq from a single bilateral pairing is a fraction of what Japan would need to make bilateral transfers material to its FY2030 NDC target. The Ministry of the Environment’s stated commitment to “vigorously advance” JCM credit issuances signals awareness of this gap. How quickly other bilateral pairs progress through the full ITMO pipeline — and in what aggregate volumes — will determine whether JCM plays a substantive or merely symbolic role in Japan’s Article 6 strategy.