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Japan's Ministry of Defense has banned Kawasaki Heavy Industries from defense tenders due to a scandal involving falsified engine efficiency tests for the Maritime Self-Defense Force's submarine fleet dating from 1988 to 2021. The incident revealed systemic issues in defense procurement and raised concerns about national security and public trust.

An investigation is underway against personnel involved, and Kawasaki has acknowledged that test results were often misleading, prompting calls for independent audits and stricter compliance measures. Experts advocate for comprehensive reforms in the defense sector to enhance transparency, accountability, and resource management.

Future steps include improving audit effectiveness, mandatory verification of test reports, and increasing supply chain traceability through technology. The situation highlights the need for ethical practices to ensure operational safety and bolster international competitiveness.