What are the benefits of introducing drone surveying?

It is possible to significantly shorten the construction period (up to 75% reduction), reduce personnel, and cut costs (approximately 40% reduction). Additionally, high-precision 3D data can be safely obtained even in dangerous sites.

What services does ARA provide for facade inspections?

ARA provides a one-stop service from land surveying, facade inspections, infrastructure inspections, and solar panel inspections to actual repair work.

Is it possible to subcontract surveying work from other companies?

Yes, we actively accept subcontracted drone surveying work for surveying and construction companies, and can handle urgent cases and labor shortages.

[Hachijo-jima - Project by Mr. Motokazu Omiyama, Site Representative of Akama Construction Co., Ltd.] Introduction of Drone Point Cloud Surveying for Disaster Recovery Works | Visualizing Landslide Volume and Reducing Construction Period by 75%

Published Apr 2, 2026 8:07 AM ・ Updated Jun 13, 2026 11:46 PM ・ 8 min read ・ Source: PR TIMES

ARA Co., Ltd. introduced drone-based 3D point cloud surveying technology in a landslide disaster recovery project on Hachijo-jima. This approach visualized the collapse range, accurately calculated the volume of earth, and dramatically improved efficiency by cutting the construction period by 75% and costs by 40%.

ARA Co., Ltd. (Headquarters: Kawasaki City, Kanagawa Prefecture; Representative Director: Masanori Arai) has realized significant operational efficiency by introducing point cloud surveying technology utilizing drones for surveying tasks in disaster recovery works.

This initiative was carried out during erosion control works aimed at preventing the collapse of private houses, following a landslide disaster in Osato Ichinosawa, Hachijo-jima.

Project Details At this site, mountain forest survey data acquired before the disaster was compared with drone survey data taken after the disaster to calculate the extent of the landslide and the volume of collapsed soil. In addition, data necessary for the recovery plan, such as the number and trunk thickness of fallen trees, was also acquired. The acquired data was visualized as a 3D point cloud, enabling the accurate calculation of the collapse status and soil volume (cubic meters), which was then utilized as submission material for administrative agencies.

Survey Overview - Target Area: Approx. 17,000 square meters - Survey Details: - 3D point cloud surveying of the landslide area - Calculation of soil volume by comparing topography before and after the disaster - Investigation of the number of fallen trees and trunk diameters

Results - Visualized the extent of the landslide collapse as 3D data - Calculated the collapsed soil volume (in cubic meters) - Utilized as data for administrative submission 👉 Contributed to improving the accuracy of disaster recovery plans

Implementation Effects Conventional Surveying - Duration: 2 days - Personnel: 6 people - Cost: Approx. 700,000 yen

Drone Surveying - Duration: 0.5 days - Personnel: 3 people - Cost: Approx. 400,000 yen

👉 75% reduction in construction period 👉 50% reduction in personnel 👉 Approx. 40% reduction in cost

Involved Parties Construction Company: Akama Construction Co., Ltd. Site Representative: Motokazu Omiyama Surveyor: 1 person Drone Surveying: ARA Co., Ltd. Pilots: Ryuji Kaneko, Tomiaki Inoue

Future Developments ARA Co., Ltd. will continue to promote the utilization of drones and 3D point cloud technology in the fields of disaster recovery, infrastructure inspection, and building investigation, contributing to the improvement of productivity and safety in the construction industry.

Service Areas - Real estate developers - Construction companies - Civil engineering companies - Land preparation contractors - Surveying companies

Regarding Subcontracting We proactively handle subcontracted drone surveying work for surveying companies and construction companies. - Urgent projects - Labor shortages - Cost adjustments - Spot responses

Future Expansion ARA Co., Ltd. will expand its business as a company providing total support for the maintenance and management of buildings and land by offering a one-stop service for drone-based: - Exterior wall investigations - Solar panel inspections - Infrastructure inspections - Land surveying

Company Profile As a construction company involved in exterior repair work for public institutions such as the Tokyo Metropolitan Government, UR Renaissance Agency, JKK Tokyo, and JKK Kawasaki, we provide a one-stop service ranging from drone-based exterior wall investigations and inspections to actual repair work.

Management Innovation Certified School Drone School Tokyo Group Drone School Commons Tachikawa Tachihi Location: Tachikawa City, Tokyo Phone: 0120-874-075 Email: drone@a-r-a-co.jp

Operating Company: ARA Co., Ltd. Location: Kawasaki City, Kanagawa Prefecture Representative: Masanori Arai Phone: 044-798-5454 Email: arai@a-r-a-co.jp Business Details: Large-scale repair works, drone surveying/inspection, exterior wall investigation, etc.

"We are currently offering a special price strictly for first-time projects. As inquiries are increasing, our availability is limited."

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Source: PR TIMES
Category: News