AlterSky Co., Ltd. (Headquarters: Toyota City, Aichi Prefecture; CEO: Hiroyuki Murai), a provider of logistics drone and drone show services, participated in the 'Feasibility Study for Drone Utilization toward Proper Human Waste Management in Yakushima National Park' initiated by the Ministry of the Environment.

On Friday, March 6, 2026, the company conducted Japan's first trial of human waste transport using drones in the mountainous areas of Yakushima. The results demonstrated a level of efficiency and cost-reduction potential that exceeds conventional methods.

Background and Objectives In the mountainous areas of Yakushima National Park, a World Natural Heritage site, various methods such as pit toilets and bio-toilets are used. However, these face numerous challenges, including high removal costs, unstable removal systems, and low usage rates of portable toilets. To address these issues, the Ministry of the Environment and relevant stakeholders explored drone utilization as a new means of infrastructure maintenance. AlterSky, a specialist in drone transport, was responsible for the study and trial flights.

Trial Overview - Date: Friday, March 6, 2026 - Location: Yakushima Town, Kumage District, Kagoshima (Within Yakushima National Park) - Cargo: Human waste poly-tanks, totaling approximately 200kg - Number of Flights: 9 flights - Operation Time: Approx. 3 hours - Flight Distance: Horizontal approx. 2.5km; Altitude difference approx. 520m

Results and Achievements The trial proved the utility of drones in environments with large elevation changes and harsh weather conditions. - Weather Conditions: Stable flight was maintained despite mountain winds averaging 6m/s and gusting up to 12m/s. - Precision Handling: Safe take-offs, landings, and unloading were performed in an extremely narrow space with a short side of less than 4 meters. - Transport Performance: Approximately 200kg was transported over 9 flights. Securing a significant weight per flight enables tasks to be completed in a short time. - Operation Team: Conducted by a 5-person team including pilots and observers. Future operations could be managed by 4 people.

Benefits of Drone Utilization Compared to Existing Methods - Improved Efficiency: Manual carry takes 6 hours round-trip with a limit of 20-40kg per person. The drone achieved 1.1x higher efficiency including travel time. - Economic Improvement: Projected costs per 20L tank show that drone transport is cheaper than helicopters and has the potential to become cheaper than manual labor. - Reduced Physical Burden: Significantly lessens the physical load of carrying 20kg loads down steep mountain paths.

Future Outlook AlterSky aims to use the success in Yakushima as a model for solving challenges in other national parks and mountain tourist destinations across Japan, fulfilling its mission of 'Solving social issues through drones.'

FACT BOX

  • Source: PR TIMES
  • Category: Event