MEGURI2040 Stage 2: Four Japanese Autonomous Ships Achieve L4 Government Certification Under Commercial Operations

Headline Finding

On 27 March 2026, Mitsui O.S.K. Lines announced that all four demonstration vessels in Stage 2 of Japan’s MEGURI2040 fully autonomous ship project had passed Ministry of Land, Infrastructure, Transport and Tourism (MLIT) inspections and commenced commercial operations as certified autonomous ships — the first time Japan’s government has formally certified multiple autonomous vessels operating at Level 4-equivalent autonomy under live commercial conditions. The milestone spans vessel types (coastal containerships, a passenger ferry, a RoRo cargo vessel) and navigation environments (congested inland sea, long-haul coastal routes), demonstrating that a national certification framework for autonomous maritime operations is now operational. This is a material advance of the technology-and-deployment clock, and it sets a concrete regulatory benchmark that port authorities, coastal logistics operators, and international maritime governance bodies must now respond to.

Detail

MEGURI2040 is a project launched in 2020 by The Nippon Foundation, with 53 domestic companies forming the DFFAS+ (Designing the Future of Fully Autonomous Ships Plus) Consortium. MOL is a consortium member and led the Existing Coastal Containership working group. The four certified vessels are:

1. GENBU — a newly built coastal container vessel approximately 134 metres in length, capacity 700 TEU, maintained by IKOUS Corporation and operated by Suzuyo Marine Co., Ltd. on a Kobe–Tokyo route via Osaka, Nagoya, Shimizu, and Yokohama. Certified by MLIT on 28 January 2026.

2. Olympia Dream Seto — a passenger ferry approximately 66 metres in length, capacity 500 passengers, operated by International Ryobi Ferry Co., Ltd. on a route linking Shin-Okayama Port (Okayama City) and Tonosho Port (Shodoshima, Kagawa Prefecture) through the congested, island-dense Seto Inland Sea. Certified on 5 December 2025 — described as the first passenger ferry in Japan to receive autonomous ship certification.

3. HOKUREN MARU No.2 — a coastal RoRo vessel approximately 173 metres in length, gross tonnage 11,413 tons, operated by Kawasaki Kinkai Kisen Co., Ltd. on the Kushiro Port (Hokkaido) to Hitachi Port (Ibaraki Prefecture) route, primarily transporting fresh milk and agricultural products. Certified on 9 February 2026.

4. MIKAGE — an in-service coastal containership 96.81 metres in length, capacity 245 TEU, operated by Imoto Shipping Co., Ltd., described as the most widely used 749 GT coastal container ship type in Japan. Autonomous navigation operational area is between Kobe and Nagoya. Certified on 25 March 2026.

All four vessels incorporate Level 4-equivalent autonomous navigation — defined for convenience using the automotive definition as fully automated operation in a designated area under specific conditions without human intervention, with the note that IMO definitions are still under discussion. Onboard systems integrate surrounding environment recognition, integrated navigat ion status display, future vessel behaviour prediction, and collision avoidance and route planning. Vessels operate in coordination with land-based Fleet Operation Centers (FOCs): a permanent FOC located at Furuno Electric Co., Ltd.’s headquarters in Nishinomiya City, Hyogo Prefecture, and a mobile FOC developed primarily by Japan Radio Co., Ltd. — a cargo trailer approximately 7 metres in length that can be relocated during emergencies. At the 27 March 2026 press conference, a demonstration described by The Nippon Foundation as a world first showed multiple autonomous ships under commercial operation connected in real time with the FOCs, enabling simultaneous navigational support for multiple vessels across different operational environments.

Governance Implication

1. TECHNOLOGY CLOCK: Japan’s MLIT has now formally certified four commercially operating autonomous vessels at L4-equivalent autonomy across three vessel types and multiple navigation environments — moving the maritime autonomous deployment clock to a point where government-backed certification under live commercial conditions is a demonstrated reality, not a pilot. The governance clock at the international level (IMO definitions still unresolved) is visibly behind.

2. LEGITIMACY LEVER: Government certification by MLIT moves the legitimacy lever materially — it converts autonomous maritime operation from an experimental programme into a legally recognised commercial activity, creating a precedent that port authorities, insurers, and coastal logistics operators must now treat as a regulatory baseline rather than a future scenario.

3. SPATIAL-ALLOCATION LEVER: The deployment of L4 autonomous vessels on congested routes (Seto Inland Sea, multi-port coastal container runs) raises immediate spatial-allocation questions for port authorities: how are berths, traffic separation schemes, and vessel traffic services adapted when a growing share of vessels operate without a conventional bridge watch? The FOC model — one permanent, one mobile — implies new land-side infrastructure requirements at ports.

4. GOVERNANCE CATCH-UP REQUIRED: The source explicitly notes that IMO’s definition of autonomous ship operational levels is still under discussion, while Japan has already issued commercial certifications using the automotive L4 definition as a proxy. This definitional gap is a pacing problem: international port-state control, flag-state liability, and insurance frameworks have not yet converged on the standards that Japan’s domestic certification now presupposes.

5. INSTRUMENT PRECEDENT: The MLIT inspection-and-certification pathway used here — covering both newly built and retrofitted vessels, cargo and passenger types — constitutes a de facto performance-based permitting instrument for autonomous maritime operations. Other maritime nations and the IMO will face pressure to either adopt or diverge from this model, making Japan’s framework a reference point for the global governance architecture.

Sources

https://www.mol.co.jp/en/pr/2026/26032.html https://www.nippon-foundation.or.jp/en/news/articles/2020/20200615-38756.html https://www.mlit.go.jp/common/001226541.pdf