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Ro ro vessel remains stranded off Izu Islands
Ryukyu Kaiun Kaisha is facing service disruption on Japan’s domestic ro ro network after its cargo vessel Niraikanai II ran aground off Toshima Island while sailing from Osaka to Tokyo.
The 11,687 gross ton vessel grounded at around 3:30 a.m. local time on June 19 near the western side of Toshima, a small volcanic island in the Izu archipelago south of Honshu. The ship was carrying vehicles and other rolling cargo on a domestic voyage when it struck a rocky area.
There were 17 crew members on board. No injuries were reported.
The operator said there was no confirmed oil spill, while local coast guard officials also reported no immediate fuel leakage. That detail matters for salvors and cargo interests alike. A grounded ro ro is already a difficult operational problem, but a pollution response would have added a second clock to the incident.
Salvage work moves to inspection phase
Early efforts to refloat the vessel were not successful, leaving the ship stranded near Toshima. Ryukyu Kaiun said it was working with relevant parties to prepare diver inspections and refloating operations.
For a vessel of this size, refloating is rarely a matter of simply pulling it free. Salvage teams need to understand the ship’s contact points, hull condition, ballast status, cargo position and local seabed profile before any serious attempt is made. Pull too early, and a manageable grounding can become a hull damage case.
The Japan Coast Guard’s 3rd Regional Headquarters issued a navigation warning on June 19, marking the vessel’s position near Toshima and advising ships in the area to navigate with caution.
Osaka, Tokyo and Okinawa services affected
The grounding has already moved from casualty response into network disruption.
Ryukyu Kaiun suspended several sailings linked to the Tokyo, Osaka and Naha trade lanes. Cancellations included the June 19 Tokyo to Osaka and Tokyo to Naha sailings, as well as the June 20 Osaka to Naha service. The company also cancelled Wakanatsu trial services scheduled for June 26 and June 29 via Hitachinaka.
For shippers using ro ro services, the impact is practical rather than dramatic. Vehicles, trailers and rolling cargo depend on fixed sailing windows. When one vessel is removed from the schedule, cargo can quickly back up across terminals, inland collection plans and onward delivery slots.
It is like removing a single gear from a working machine. The rest of the system may still move, but not at the same rhythm.
Cause remains under investigation
Officials have not determined the cause of the grounding. The crew reported the incident by emergency message, and the Japan Coast Guard sent a patrol vessel to the site.
Local reports said weather conditions were relatively calm at the time, with waves of about 50 centimetres and southeast winds of around 6 metres per second. Investigators are expected to review navigation data, bridge procedures and voyage records.
The Niraikanai II was built in 2017 and measures 181 metres in length. It operates on domestic routes linking Okinawa, Osaka and Tokyo, carrying vehicles, trailers and other rolling cargo.
The next operational step is the diver inspection. That assessment will guide whether the ship can be safely refloated, whether cargo handling is needed before the attempt, and when affected domestic sailings can begin returning to schedule.
