Published：Mar 10, 16:00Last updated：Mar 17, 08:05

Giant Steel Pipe Eruption in Osaka Disrupts City and Prompts Investigation

Mar. 10, 2026 16:00

On March 11, 2026, in Osaka, a large underground pipeline unexpectedly burst out of the ground, reaching approximately 18 meters high and nearly hitting a nearby overpass. The pipeline, 3.5 meters in diameter and 27 meters long, caused a loud noise and was confirmed to be undamaged to nearby structures. Authorities responded quickly, closing roads and investigating the cause, which is believed to be related to ongoing sewer construction. No injuries were reported.

Summarized

15News

10Media

Mar. 13, 2026 14:41

A steel pipe measuring 13 meters in height was ejected from a highway in Osaka, Japan, according to local authorities. The incident involved a large pipe protruding above ground, but further details about the cause or consequences are not provided.

Mar. 17, 2026 08:05

On March 17, 2026, Osaka City lifted traffic restrictions on a road near Osaka Station after a 13-meter steel pipe, which had been buried underground, protruded to 13 meters above ground. The pipe, used as a shaft for sewer work, was found to have risen due to underground water buoyancy after water was drained. The closure, which had lasted since March 11, affected multiple lanes, with some remaining restrictions. The pipe's dimensions are 3.5 meters in diameter and 27 meters long, weighing 56 tons, and it was originally buried for construction purposes.

A major infrastructure incident occurred in Osaka, Japan, when a massive steel pipe, originally buried for sewer construction, unexpectedly protruded 13 meters above ground near JR Osaka Station in Kita Ward. The event, which began on March 11, 2026, caused significant traffic disruptions, road closures, and public alarm. The pipe, measuring 3.5 meters in diameter, 27 meters long, and weighing 56 tons, was used as a shaft for sewer work. Authorities attribute the incident to buoyancy forces after underground water was drained, and have since reopened most affected roads after safety inspections, though some restrictions remain. No injuries were reported, but the event has sparked an official investigation and highlighted challenges in urban infrastructure maintenance. Asahi Shimbun+2

🚧 Incident Timeline and Immediate Response

The pipe surfaced suddenly during sewer excavation, startling commuters and causing panic among residents. Emergency responders, including firefighters, secured the area and sprayed water on the pipe to prevent further movement. The incident led to the closure of major routes, including the Shin-Midosuji elevated road, and caused severe traffic congestion. The city acted swiftly to conduct safety checks, and by March 17, most traffic restrictions were lifted, though some lanes remain closed for further inspection. Asahi Shimbun+2

🏗️ Technical Details and Ongoing Investigation

Authorities confirmed the pipe did not damage the elevated highway above. Investigations revealed that the pipe, serving as a shaft for sewer work, was ejected due to buoyant forces after water drainage. The pipe’s dimensions—13 meters above ground, 3.5 meters in diameter, 27 meters long—underscore the scale of the incident. Experts are examining the sequence of events and considering chemical reinforcement of the ground to prevent recurrence. The origin and purpose of the pipe were initially unclear, prompting further scrutiny. La Presse+2

🚦 Public Impact and Official Response

The eruption caused confusion and concern among Osaka residents, with eyewitnesses describing the shock of seeing a giant steel cylinder as tall as a four-story building emerge from the ground. The Osaka City Sewer Department issued a public apology and pledged a thorough investigation. The incident has raised questions about safety protocols in large-scale urban projects and highlighted the importance of rigorous infrastructure maintenance in densely populated areas. Asahi Shimbun+2

JapanKita WardShin-MidosujiJR Osaka StationOsaka City Sewer Department