日本語 
Japan’s telecommunications industry has moved closer to a form of connectivity after SoftBank Corp. Successfully tested a high-altitude platform station (HAPS) over Japan. The trial marks a step toward using the stratosphere as an extension of the country’s mobile network and could eventually provide connectivity to remote areas support disaster recovery and enable communications for drones and other aerial systems.
SoftBank and U.S.-based Sceye successfully conducted trial services using Sceye’s than-air HAPS platform. The system operated in the stratosphere. Demonstrated communications between the HAPS and ordinary smartphones as well as between the platform and drones. SoftBank says the achievement is Japan’s successful stratospheric communications test of this type in Japanese airspace.
The companies plan to use the results to prepare for HAPS commercialization in Japan from 2027 onward including improving communications quality and developing frameworks.
What Is HAPS Technology?
HAPS or High Altitude Platform Station essentially puts a communications platform in the sky.
Unlike satellites HAPS platforms operate much closer to Earth typically in the stratosphere. SoftBank describes the technology as a ” base station” capable of providing direct-to-device mobile connectivity.
This approach could complement networks and satellites rather than replace them. A HAPS platform can potentially provide coverage over areas where constructing mobile infrastructure is difficult or economically unattractive.
For an island nation such as Japan that capability could have value.
Disaster Communications Could Be a Major Use Case
One of the arguments for HAPS in Japan is disaster resilience.
Earthquakes, tsunamis, typhoons and other natural disasters can damage telecommunications infrastructure. When mobile towers, fiber connections or power systems are disrupted, restoring connectivity can take time.
A HAPS platform could provide a communications layer from above.
SoftBank has specifically identified disaster recovery as one of the applications of HAPS technology. The platform could help restore communications, over areas without requiring the immediate reconstruction of damaged ground infrastructure.
For emergency services local governments and businesses resilient connectivity could become a part of disaster-preparedness strategies.
Remote Regions Could Gain Better Connectivity
High-Altitude Platform Systems or HAPS could help solve connectivity problems in areas, remote islands and other hard-to-reach places where building traditional infrastructure is tough. In Japan the terrain makes it especially difficult for telecom companies to install and maintain towers and cables. The country’s many mountains and scattered islands create challenges for reliable mobile coverage.
A HAPS system floats high in the sky. Can cover a wide area from one spot. That means it could reach places that have been left out of the network for years. With connectivity, people and businesses in these areas could use cloud services work from home make digital payments improve tourism experiences and use Internet of Things devices more effectively.
The Technology Could Support Japan’s Drone Economy
The recent test is especially promising because SoftBank showed that the HAPS platform can communicate directly with drones. This is a step forward. Drones are becoming more common in Japan for deliveries checking bridges and power lines responding to disasters and farming.. Most drones today are limited by how far they can fly and where they can send data.
A HAPS system could act as a communication bridge for drones allowing them to fly distances and stay connected. This could help create what SoftBank calls a three- communications network. One that works not just on the ground but in the air and sky.
This would be good, for drone makers companies making systems, delivery services and businesses using industrial Internet of Things. It could unlock uses for drones and help Japan grow its drone economy.
HAPS Could Become Part of Japan’s 6G Strategy
The development also fits into the longer-term evolution of wireless communications.
SoftBank has been researching aerial network technologies as part of its vision for next-generation communications. The company has described the coordination of aerial base stations with terrestrial networks as part of its efforts toward three-dimensional network coverage.
As Japan moves toward future 6G networks, connectivity is increasingly being considered across multiple layers: ground, air and space.
HAPS could occupy the middle layer between terrestrial infrastructure and satellites.
That could provide network operators with greater flexibility when designing nationwide and regional coverage.
New Opportunities for Japan’s Technology Industry
The commercialization of HAPS could create opportunities well beyond telecommunications.
Companies operating in Japan could find demand for:
High-altitude aircraft technologies
Satellite and aerospace components
Antennas and radio-frequency equipment
Semiconductor technologies
Edge computing
Network-management software
Drone communications
AI-based network optimization
Cybersecurity
Disaster-response systems
The technology therefore creates a potential new market at the intersection of telecommunications, aerospace and information technology.
Japanese manufacturers with expertise in lightweight materials, electronics, batteries and precision engineering could also become part of the emerging supply chain.
Challenges Will Remain
Despite the successful test, commercial deployment will not be straightforward.
HAPS platforms need to remain operational at very high altitudes while maintaining reliable communications. Weather, airspace management, spectrum coordination, maintenance, cybersecurity and operational costs will all need to be addressed.
Network operators will also need to integrate HAPS with existing mobile infrastructure.
The technology will therefore require cooperation between telecom companies, aerospace firms, regulators and technology suppliers.
For businesses, that means the HAPS market could develop gradually rather than replacing conventional networks overnight.
A New Layer of Japan’s Digital Infrastructure
SoftBank’s successful HAPS trial represents more than an experimental communications demonstration. It points toward a future in which Japan’s mobile network could extend beyond traditional ground-based infrastructure into the stratosphere.
The planned commercialization from 2027 onward could create new opportunities for telecommunications, aerospace, drones, semiconductors, cybersecurity and AI-powered network technologies.
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The most immediate benefit could be improved disaster resilience and connectivity in hard-to-reach regions. Over time, however, the technology could support entirely new applications involving drones, autonomous systems and three-dimensional networks.
For Japan’s technology industry, the significance is clear: the next generation of connectivity may not be built entirely on towers and fiber.
With HAPS, part of Japan’s future mobile network could literally be in the sky.
English