Disaster Location Sharing App 'Cocodayo' Now Supports 'docomo Starlink Direct' Satellite-to-Smartphone Communication
Genetech's disaster prevention app 'Cocodayo' has expanded its support to NTT DOCOMO's 'docomo Starlink Direct.' Following KDDI, it now covers Japan's two major carriers, enabling location sharing and safety confirmation even in off-grid areas like mountains and islands via satellite.
📋 Article Processing Timeline
- 📰 Published: April 27, 2026 at 21:10
- 🔍 Collected: April 27, 2026 at 12:31
- 🤖 AI Analyzed: April 28, 2026 at 02:13 (13h 41m after Collected)
Genetech Inc. (Headquarters: Shinjuku-ku, Tokyo; President: Kenji Ueno; hereinafter "Genetech") is pleased to announce that its disaster location information sharing app "Cocodayo" now supports "docomo Starlink Direct," a satellite-to-smartphone direct communication service provided by NTT DOCOMO, INC. (hereinafter "docomo").
This marks the second major domestic carrier supported by "Cocodayo" for direct satellite-to-smartphone communication, following KDDI Corporation's "au Starlink Direct."
## Expanded User Convenience
"docomo Starlink Direct" is a service utilizing SpaceX's "Starlink Mobile" to enable direct communication between satellites and smartphones, which docomo will start providing on Monday, April 27, 2026.
By supporting this service, "Cocodayo" enhances the reachability of its basic functions—such as disaster location sharing, safety confirmation with family, checking weather and disaster alerts, referencing shelter information, and tracking group members' locations—even outside docomo 5G/4G LTE areas within Japan (including territorial waters), provided there is a clear view of the sky and a compatible smartphone. (Currently, map display, PUSH notifications, chatbots, and billing functions are unavailable during satellite communication.) This expands the means for situational awareness and initial decision-making in environments where mobile signals are hard to reach, such as mountainous areas, remote islands, and the open sea.
## Significance of the Initiative
Following its support for "au Starlink Direct," "Cocodayo" now covers the satellite-to-smartphone direct communication services of Japan's two major carriers. This enables the provision of disaster prevention and safety confirmation methods in out-of-service areas to an even broader range of smartphone users.
## Future Developments
Genetech will continue to strive for the enrichment and development of the "Cocodayo" service, contributing to the creation of a safe and secure society. Additionally, through collaboration with local governments, educational institutions, and corporations, we will work toward advancing the infrastructure for disaster prevention communication.
## Terms of Use and Precautions
"docomo Starlink Direct" mentioned herein is a service of NTT DOCOMO, INC. A compatible smartphone is required, and it can only be used in areas outside docomo 5G/4G LTE coverage within Japan (including territorial waters) where the sky is visible. Sending and receiving may take time depending on satellite acquisition status, and instantaneous or continuous connection is not guaranteed.
Compatible models and terms of use are subject to change; please check the latest information from NTT DOCOMO's official website.
For "Cocodayo" functions, pricing, and usage, please refer to the product website.
## About "Cocodayo"
"Cocodayo" is a disaster location sharing app that automatically notifies family and loved ones of your location when a disaster occurs. Its strength lies in being able to automatically share your most recent location before communication becomes difficult, strongly supporting safety confirmation during emergencies.
Since its release, continuous efforts to improve usability have resulted in over 1.91 million cumulative downloads (as of the end of March 2026) and a high evaluation with a retention rate of approximately 98%.
Furthermore, the technology forming the base of "Cocodayo" is rooted in in-house patents, with a total of 37 patents acquired in Japan and overseas. We look forward to responding to the needs of more people with an eye toward international expansion in the future.
Product Site URL: https://www.cocodayo.jp/
## About docomo Starlink Direct
Please refer to the official details provided by NTT DOCOMO.
## About Genetech
Name: Genetech Inc.
Established: July 1, 1985
Representative: President Kenji Ueno
Headquarters: 25F Shinjuku Island Tower, 6-5-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo 163-1325
Business Description:
- System Solution Business providing systems through the fusion of software and hardware.
- Engineering Solution Business contributing to efficiency, productivity improvement, and overall optimization in manufacturing using 3D-CAD/CAM "Mastercam," 3D simulation "FlexSim," PLM "Windchill," and ALM "Codebeamer."
- GPS Business providing safety and security using location information, including the disaster location sharing app "Cocodayo."
This marks the second major domestic carrier supported by "Cocodayo" for direct satellite-to-smartphone communication, following KDDI Corporation's "au Starlink Direct."
## Expanded User Convenience
"docomo Starlink Direct" is a service utilizing SpaceX's "Starlink Mobile" to enable direct communication between satellites and smartphones, which docomo will start providing on Monday, April 27, 2026.
By supporting this service, "Cocodayo" enhances the reachability of its basic functions—such as disaster location sharing, safety confirmation with family, checking weather and disaster alerts, referencing shelter information, and tracking group members' locations—even outside docomo 5G/4G LTE areas within Japan (including territorial waters), provided there is a clear view of the sky and a compatible smartphone. (Currently, map display, PUSH notifications, chatbots, and billing functions are unavailable during satellite communication.) This expands the means for situational awareness and initial decision-making in environments where mobile signals are hard to reach, such as mountainous areas, remote islands, and the open sea.
## Significance of the Initiative
Following its support for "au Starlink Direct," "Cocodayo" now covers the satellite-to-smartphone direct communication services of Japan's two major carriers. This enables the provision of disaster prevention and safety confirmation methods in out-of-service areas to an even broader range of smartphone users.
## Future Developments
Genetech will continue to strive for the enrichment and development of the "Cocodayo" service, contributing to the creation of a safe and secure society. Additionally, through collaboration with local governments, educational institutions, and corporations, we will work toward advancing the infrastructure for disaster prevention communication.
## Terms of Use and Precautions
"docomo Starlink Direct" mentioned herein is a service of NTT DOCOMO, INC. A compatible smartphone is required, and it can only be used in areas outside docomo 5G/4G LTE coverage within Japan (including territorial waters) where the sky is visible. Sending and receiving may take time depending on satellite acquisition status, and instantaneous or continuous connection is not guaranteed.
Compatible models and terms of use are subject to change; please check the latest information from NTT DOCOMO's official website.
For "Cocodayo" functions, pricing, and usage, please refer to the product website.
## About "Cocodayo"
"Cocodayo" is a disaster location sharing app that automatically notifies family and loved ones of your location when a disaster occurs. Its strength lies in being able to automatically share your most recent location before communication becomes difficult, strongly supporting safety confirmation during emergencies.
Since its release, continuous efforts to improve usability have resulted in over 1.91 million cumulative downloads (as of the end of March 2026) and a high evaluation with a retention rate of approximately 98%.
Furthermore, the technology forming the base of "Cocodayo" is rooted in in-house patents, with a total of 37 patents acquired in Japan and overseas. We look forward to responding to the needs of more people with an eye toward international expansion in the future.
Product Site URL: https://www.cocodayo.jp/
## About docomo Starlink Direct
Please refer to the official details provided by NTT DOCOMO.
## About Genetech
Name: Genetech Inc.
Established: July 1, 1985
Representative: President Kenji Ueno
Headquarters: 25F Shinjuku Island Tower, 6-5-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo 163-1325
Business Description:
- System Solution Business providing systems through the fusion of software and hardware.
- Engineering Solution Business contributing to efficiency, productivity improvement, and overall optimization in manufacturing using 3D-CAD/CAM "Mastercam," 3D simulation "FlexSim," PLM "Windchill," and ALM "Codebeamer."
- GPS Business providing safety and security using location information, including the disaster location sharing app "Cocodayo."