Dioxin Emission Manipulation - September 1999 In 1999, manipulation of dioxin emission data was uncovered at incineration facilities in Yokohama City, Osaka City, and Kawasaki City. At one facility, concentrations exceeding 10 nanograms—over 100 times the standard limit of 0.1 nanograms—were recorded, leading to severe air and soil contamination in the surrounding area. This was driven by the burden of equipment upgrade costs following stricter regulations introduced in 1997. The Ministry of the Environment investigated approximately 120 facilities nationwide and confirmed violations at 15%. At the Kawasaki City facility, it was found that filter replacements had been neglected.

Dioxin Emission Manipulation - September 1999 In 1999, manipulation of dioxin emission data was uncovered at incineration facilities in Yokohama City, Osaka City, and Kawasaki City. At one facility, concentrations exceeding 10 nanograms—over 100 times the standard limit of 0.1 nanograms—were recorded, leading to severe air and soil contamination in the surrounding area. This was driven by the burden of equipment upgrade costs following stricter regulations introduced in 1997. The Ministry of the Environment investigated approximately 120 facilities nationwide and confirmed violations at 15%. At the Kawasaki City facility, it was found that filter replacements had been neglected.

As countermeasures, high-temperature incineration technology developed by Ebara Corporation and Mitsubishi Heavy Industries was introduced, reducing emissions by up to 90% or more. Additionally, Kawasaki Heavy Industries' real-time emission monitoring system was adopted, contributing to ensuring data transparency and preventing fraud. This incident highlighted the importance of environmental technology and stricter regulations, promoting improvements in waste disposal systems.