Revolutionizing Maintenance and Confined-Space Work: Ultra-Low-Profile 'Thin Plate Compactor' That Slides Under Rails Launches in June

KenRobo-Tech Co., Ltd. (Headquarters: Miki-cho, Kida-gun, Kagawa Prefecture; President and CEO: Tatsuya Mabe), driven by the vision of 'creating the world’s most human-friendly construction sites,' announces the launch in June 2026 (Reiwa 8) of the industry’s first ultra-low-profile 'Thin Plate Compactor,' co-developed with Mitsukasa Industry Co., Ltd., a manufacturer of compact construction machinery.

This product reduces the overall height by 420mm compared to conventional models, making it an innovative labor-saving device that eliminates the need for physically lifting heavy compactors in low-clearance environments such as under railway tracks during ballast replacement work or in utility pipeline installation projects.

Due to strong demand, the initial production run for June deliveries (limited to 30 units) has already been fully reserved. Reservation for deliveries from August onward is now open.

Background and On-Site Challenges

In traditional railway ballast replacement (replacing track ballast) and subgrade compaction during infrastructure renewal projects, it has been essential to manually lift heavy equipment to maneuver around rails or existing structures. In confined spaces where structures are located directly above the compaction area—such as under platforms or in double-slab structures—existing compaction machines could not physically enter, making adequate compaction extremely difficult. In such challenging environments, achieving both improved working conditions (labor-saving and enhanced safety) and guaranteed construction quality to prevent uneven settlement has long been a critical challenge in construction and maintenance sites.

KenRobo-Tech was selected as a participant in the 'JR East Japan Startup' program in 2023. Responding to these real-world site challenges, the company completed the development of this product through joint efforts with Mitsukasa Industry Co., Ltd.

Key Product Features

1. Unprecedented Low-Profile Design That 'Slides Under' Rails and Structures

By redesigning the handle folding mechanism and safety guard, the unit’s total height is reduced to just 395mm (420mm lower than conventional models). This allows the machine to pass under narrow rails or tight clearances without interference, eliminating the need for manual lifting.

2. Enhancing Construction Quality in Confined Spaces Previously Inaccessible to Machinery

This is the only plate compactor capable of operating in sites with overhead structures and limited vertical clearance, such as water and sewer pipe installations, culvert renewal, under platforms, double slabs, and other special construction scenarios. By enabling robust compaction in previously inaccessible tight spaces, it reduces post-construction settlement risks and contributes to improved overall quality and long-term safety in civil and construction projects.

3. Industry-First Foldable One-Touch Handle (Patent Pending) for Superior Operability

A new mechanism allows the handle to be locked simply by gripping and sliding the height-adjustment lever. Unlocking is achieved instantly by stepping on a foot pedal. This minimizes operator posture changes, enabling intuitive and safe operation when navigating obstacles.

Product Overview

・Product Name: Thin Plate Compactor (Model: MVC-50HJ)

・Price: Open pricing

・Distributor: Inquiry required

・Delivery Schedule: Initial production run for June deliveries (30 units) is sold out.

Reservations for deliveries from August onward are now being accepted.

【Future Outlook】

Guided by our mission to 'create the world’s most human-friendly construction sites,' we will continue to improve harsh working conditions at infrastructure maintenance, civil, and construction sites through the widespread adoption of this product. Simultaneously, we aim to support uncompromised high-quality construction in previously difficult confined spaces, contributing to the longevity of Japan’s infrastructure and the sustainable development of the construction industry.

About KenRobo-Tech

'Creating the world’s most human-friendly construction sites'

Founded in 2013 by a construction site veteran, KenRobo-Tech is a specialized R&D company.

Leveraging extensive knowledge and expertise gained from years of on-site research, we deliver labor-saving and manpower-reducing solutions that seamlessly integrate into real-world construction environments.

Through collaborative robots like the 'Tomorobo Series' and development partnerships with various companies, we contribute to the healthy evolution and advancement of the construction industry by providing practical solutions that enhance productivity while ensuring worker safety and reducing physical burden.

・About the 'Tomorobo' Series

'Tomorobo' is KenRobo-Tech’s dedicated construction-site Cobot brand, designed to realize our vision of the 'world’s most human-friendly site.' Working alongside skilled workers, Tomorobo handles repetitive, high-volume tasks to improve efficiency and productivity.

Company Name: KenRobo-Tech Co., Ltd. https://kenrobo-tech.com/

Headquarters: 246-2 Kamitakao, Miki-cho, Kida-gun, Kagawa Prefecture

Tokyo Office: Room 101, Higashiikebukuro Heights Niban-kan, 3-20-16 Higashiikebukuro, Toshima-ku, Tokyo

Established: July 3, 2013

Representative: President & CEO Tatsuya Mabe

Business Activities:

・Development and provision of labor-saving and manpower-reducing robotic solutions specialized for construction sites

・Smart construction consulting, RX consulting

・Development and sales of labor environment improvement materials

・Contract development (new and modified development), development consulting