Kawasaki reports submarine engine inspection irregularities, expands investigation

Kawasaki Heavy Industries announced on August 29, 2025, that inspection irregularities related to fuel efficiency, previously disclosed for marine engines, have now also been reported in submarine engines manufactured up to 2021. The company apologized for the concern and inconvenience caused.

An external special investigation committee, established in August 2024 to investigate the marine engine case, presented an interim report in January 2025. Following a request for cooperation in June 2025, the committee informed Kawasaki in August 2025 that the likelihood of such irregularities in some submarine engine models had increased. Kawasaki promptly reported this to the Ministry of Defense.

The committee continues its investigation, including similar cases at domestic subsidiaries, and a final report is expected once the external investigation is complete. Kawasaki is committed to full cooperation, strengthening its compliance and governance, and implementing recurrence prevention measures. The impact on earnings will be disclosed following further investigation results.