This year marks the fourth time this combined training occurred between the U.S. Navy and JMSDF EOD forces, and the second joint engagement with the U.S. Marine Corps’ (USMC) 3rd EOD Company in year 2025. The exercise provided a rare opportunity to apply MCM tactics, techniques, and procedures against live, unarmed naval mines in a dynamic underwater environment.

Thirteen personnel from EODMU-5 formed an Expeditionary MCM (ExMCM) task element and embarked aboard the JMSDF Uraga-class mine countermeasure vessel JS Uraga (MST 463) to execute the full detect-to-engage sequence alongside JMSDF and USMC EOD counterparts. The team employed MK 18 Mod 1 unmanned underwater vehicles (UUVs) and EOD divers to train to a detect-to-engage sequence with various mine shapes in the waters surrounding Iwo To.

“This exercise delivers an unmatched opportunity for our divers and technicians to train with live demolition materials and refine our capability to neutralize underwater threats in challenging environments,” said Lt. j.g. Christopher Teufel, officer-in charge of the ExMCM task element.

“Working side-by-side with our Japanese and Marine Corps partners enhances not only our technical skill, but our ability to operate seamlessly together in future missions.”

The volcanic topography around Iwo To offered participants advanced training in hydrographic surveying, underwater navigation, and demolitions on shifting terrain—skills that are vital to maintaining access to critical maritime routes in the Indo-Pacific.

“Iwo To Live MINEX is a prime example of U.S.-Japan interoperability and commitment to regional maritime security,” Teufel said. “The integration of U.S. Navy UUVs and divers with JMSDF EOD enhances our combined capability to counter underwater threats.”

Task Force 75 executes command and control of assigned Navy Expeditionary Combat Forces in the U.S. 7th Fleet area of operations. They plan and execute Naval Construction, Expeditionary Logistics, Explosive Ordnance Disposal, Maritime Expeditionary Security, and Exploitation in support of Commander, U.S. 7th Fleet for crisis response, humanitarian assistance, and major combat operations.