Japan Develops Unmanned Amphibious Assault Vehicle for Island Recovery Operations

In 2024, Japan initiated a project to develop a domestically manufactured unmanned amphibious armored vehicle. Recently released materials from the Japanese Ministry of Defense revealed detailed specifications of this new vehicle, as reported by Naval News.

For over a decade, Japan has been strengthening its maritime defense capabilities in response to the growing military power of China. Protecting the Nansei Islands, including Okinawa, has become an urgent priority due to their vulnerability to potential amphibious assaults by the Chinese military amid developments related to Taiwan.

In this context, the Japan Ground Self-Defense Force established a rapid deployment amphibious brigade in 2018, based in Nagasaki Prefecture on Kyushu Island in the south of the country. This brigade is the first specialized amphibious unit in the history of Japan's ground forces and is often compared to a marine corps. Its mission is to reclaim remote islands that could be seized by hostile forces.

The brigade consists of three infantry battalions known as rapid deployment amphibious battalions, alongside a combat landing battalion equipped with American-made AAV-7 amphibious assault vehicles. The 52nd Battalion operates one such vehicle to transport infantry units to remote islands and support securing beachheads with protection and firepower.

However, the AAV-7 vehicles face several challenges. Many Japanese islands are surrounded by coral reefs, which these vehicles have limited capability to cross. This restricts landing operations primarily to gently sloping sandy beaches, reducing the number of feasible landing sites. Additionally, their armament is limited to a 12.7 mm machine gun and a 40 mm automatic grenade launcher, which is insufficient for effectively engaging enemy armored vehicles.

To address these issues, the Ministry of Defense decided to proceed with developing a domestically produced amphibious assault vehicle. The new vehicle is designed to generate significant propulsion using tracks and water jets mounted at the rear of the hull to overcome coral reefs, thereby enabling landings from a wider variety of locations on remote islands.

Regarding armament, the vehicle is expected to be equipped with a remotely controlled weapon station capable of mounting either a 12.7 mm machine gun or a 30 mm automatic cannon, allowing it to engage enemy armored vehicles effectively.

A key feature of the project is that the vehicle is being developed to operate in multiple modes: crewed onboard, remotely controlled from another vehicle, or autonomously within a manned-unmanned teaming (MUM-T) concept.

This approach aims to reduce human casualties by deploying an unmanned first wave of landing forces, which are typically the most exposed to losses during enemy penetration and securing a foothold on hostile shores.

Japanese military expert Santaro Iwamoto obtained materials related to the new vehicle through a freedom of information request submitted to the Acquisition, Technology & Logistics Agency (ATLA), responsible for defense equipment development, and provided them to Naval News.

According to these materials, ATLA plans to manufacture four prototype vehicles before commencing operational testing scheduled for 2027. All vehicles will be equipped with remote control and autonomous movement capabilities, with one vehicle also receiving enhanced power generation features in anticipation of future upgrades.

The vehicle's hull will incorporate a suite of systems including optical and infrared sensors among others. By sharing data between different vehicles, remote control operations will be feasible.

The vehicle will also be capable of autonomous navigation by following a pre-set route based on predetermined waypoints established by the crew.

To enable networked combat operations, the vehicle is expected to be fitted with a command and control system based on the one used in Japan's Type 10 main battle tank. This system will allow sharing of target location data detected by the vehicles or other assets across the entire force, as well as transmitting operational instructions and distributing engagement targets.

Estimates indicate that the Japanese Ministry of Defense plans to deploy approximately 97 units of this locally produced vehicle. Following the completion of various tests during 2027, deployment is scheduled to begin in 2028.