Originating from the Arms and Machinery Shop of Maizuru Naval Arsenal established in 1901, we have mainly been producing and supplying the highest advanced defense systems & equipments for the Japanese Self Defense Forces and also the factory automation devises and underwater working vehicles for the various industries.

Our main business lines of defense systems & equipments are; mines, mine-counter-measures, onboard equipments for naval ship including ship pilot & control system, wheeled multi-purpose amphibious vehicle, CBRN decontamination system and so on as shown below.

Ship to Ship Supplying System

This devise fitted onboard of the AOE of Japan Maritime Self Defense Force has supplied oil and various materials to many naval ships of various nations serving peace keeping operation in Indian Ocean.

Automatic Pilot & Control System for Mine Sweepers

This system and other outfitting equipments such as rudder carrier, anchoring devise and etc. for Mine Sweepers of Japan Maritime Self Defense Force exclusively built by JMU Defense Systems, contribute to the accurate ship control under the mine-sweeping operation.

Wheeled Multi-purpose Amphibious Vehicle

In 1994, combination with the shipbuilding technology of JMU, we had developed the “Type-94 Amphibious Mine Layer” for Japan Ground Self Defense Force, which is only Amphibious Vehicle for military purpose produced in Japan.
Based on this experience, we have developed new amphibious vehicle “Wheeled Multi-purpose Amphibious Vehicle” which will be used as logistic support vehicle in the several situations in the world.

CBRN Decontamination System

This mobile CBRN decontamination devise had been developed in 1994 for Japan Ground Self Defense Force, and have been effectively used in several CBRN incidents and great disasters in Japan. This system is used not only for CBRN decontamination operations but also for shower service by supplying hot water at the evacuation camp in the great disaster situation. Especially this system was used by JGSDF as indispensable equipment at the disastrous nuclear generating plant incident caused by earthquake and tsunami on March 11, 2011.

Autonomous Ship

Multi-Purpose USV is high performance Unmanned Surface Vehicle (USV), developed for various mission that needs speed, stability and endurance. MP-USV has enhanced dynamic positioning and towing capability with twin advanced diesel WJ propulsion system. Unique retractable hull dome provides capacity to install various kinds of sensor and equipment.

Automatic-welding Devise

We have developed and supplied such advanced self-welding devises for JMU and other steel-fabricators.

Underwater Maintenance Vehicle for private companies

We have developed and supplied such advanced remote controlled underwater vehicles for electricity generating plant and other underwater servicing companies to remove accumulated earth and sand in dam and water reservoir.


JMU Defense Systems Co.,Ltd.

Head Office and Works

1180, Amarube-shirno, Maizuru, Kyoto 625-8501, Japan
TEL: +81-773-62-8718
FAX: +81-773-64-6279

Tokyo Office

5th Floor, Round-Cross Shiba Daimon, 1-3-4, Shibadaimon, Minato-ku, Tokyo 105-0012, Japan
TEL: +81-3-6432-0310
FAX: +81-3-6432-0306