The amphibious bulldozer (D155W-1) was developed in 1971 and first used in Omaezaki Port in Shizuoka Prefecture and Sagami River in Kanagawa Prefecture.

Only five amphibious bulldozers are still in operation today. Asunaro Aoki Construction owns them all and use them for underwater construction across Japan.

Amphibious bulldozers have been used at more than 1,200 sites along the coast and in the rivers. They remain indispensable to countering natural disasters that are rising in numbers due to climate change.

Amphibious bulldozers have worked at shallow waters up to 7 meters deep. The underwater construction robot will be designed to go as deep as 50 meters, enabling it to better protect marine and river environment.

* The concept machine is designed to go up to 7 meters deep.

The underwater construction robot is powered by electricity and is zero-emission. In addition, the latest ICT and automatic control functions enable operation of the robot without technical skills. The robot can be remotely controlled from the safety and comfort of an office — away from the construction site which makes it not only environmentally friendly, but also worker-friendly.