Naha GSDF unit revises disposal procedures after June 2024 blast
The Ground Self-Defense Force 101st Unexploded Ordnance Disposal Unit in Naha is revising its handling procedures following a June 2024 blast that injured four personnel, introducing X-ray equipment and increasing base disposal frequencies to reduce operational risks, yomiuri.co.jp reported.
June 2024 Blast Triggers Safety Overhauls for Naha Disposal Unit
The operational review stems directly from an incident on June 9, 2024, at a U.S. ammunition storage area in Yomitan Village, Okinawa. During exterior “re-identification” work—where personnel sort and assess munitions to gauge explosive risks—workers used hammers and other tools to clear rust from an unexploded device. The physical impact triggered the munition’s fuze, causing a sudden rupture that injured four soldiers. One soldier sustained severe arm burns requiring hospitalization. According to yomiuri.co.jp, this marked the first time the unit experienced an accident during disposal operations since its establishment roughly half a century ago in June 1974. The unit was originally formed following a tragic 1974 construction site explosion near a Naha kindergarten that killed four people, including a three-year-old girl.
Ministry of Defense Mandates Stricter Munition Disposal Rules
In response to the accident, the Ministry of Defense issued a strict July 2024 directive banning actions that apply impact to fuzes, prohibiting tools on uncertain items, and ordering units to route unidentifiable munitions straight to explosive destruction. To operationalize these safety rules, the 15th Brigade negotiated with U.S. forces to increase base disposal operations from twice a year (June and December) to three times a year, adding a September cycle. The unit borrowed portable X-ray equipment typically used by other prefectural units during overseas deployment ammo inspections. This technology allows operators to view internal munition components on computer screens without scraping away exterior corrosion. Second Lieutenant Masamitsu Yagoka noted that while severe degradation in World War II-era ordnance makes visual checks nearly impossible, the new X-ray devices improve identification accuracy significantly and show that strict vigilance is necessary.
Unexploded Ordnance Remains Buried Across Okinawa
Okinawa remains heavily impacted by remnants of the 1945 battle, where roughly 200,000 tons of ordnance were expended in what contemporary accounts termed an iron storm. While post-war authorities have cleared thousands of tons, approximately 1,800 tons of unexploded ordnance are estimated to remain buried across the prefecture. Last fiscal year alone, the 101st Unexploded Ordnance Disposal Unit handled about 20,100 items weighing a total of roughly 11.5 tons across 466 dispatched calls. yahoo.co.jp noted that the unit routinely operates in densely populated urban environments, balancing public safety with the inherent dangers of degrading munitions. Defense officials are currently coordinating equipment purchases to formally procure the X-ray devices for permanent deployment starting next fiscal year, while joint training exercises such as Keen Sword 27 continue to test the revised safety protocols.