Japan Aerospace Exploration Agencys

Communication drills disaster practical torrential rain, such as large-scale earthquake

Experiment Date

June 1st, 2014

Experiment Agency

Kochi Prefecture, JAXA

Location of Experiment

The right bank of Monobe River (Nankoku City, Kochi Prefecture)
Kochi Prefectural Office (Marunouchi, Kochi City, Kochi Prefecture)
JAXA Tsukuba Space Center: Internet Gateway Station

Outline of Experiment

  JAXA and Kochi Prefecture implemented the communication training aimed to share disaster information quickly and efficiently by Integrated Disaster Prevention Information System* and HDTV conference utilizing “Kizuna”, at FY 2014 Kochi Prefecture Integrated disaster prevention training.
  HDTV conference system connected between the disaster headquarters on the right bank of Monobe River and the operational room of Kochi Prefectural Office, and two sites shared disaster information and corresponded with each other.

*The system developed by Kochi Prefecture to gather and share the damage situation from cities, towns and villages when a disaster occurs.



The right bank of Monobe River: Portable VSAT

Kochi Prefectural Building: Portable VSAT
Experimental Results

Information sharing by Integrated Disaster Prevention Information System utilizing “Kizuna”
  The disaster headquarters implemented information sharing by Integrated Disaster Prevention Information System utilizing “Kizuna”.
  As a comment on the wide bandwidth and the high speed communication line capability of Kizuna, Kochi Prefecture staff said “The response of Integrated Disaster Prevention Information System was excellent and I did not feel any stress about its operation.”

Connection with Integrated Disaster Prevention Information System


  All functions of Integrated Disaster Prevention Information System could be used with the same feeling as a ground communication line, for browsing disaster information and disaster database of public agencies, registering the disaster information with images or movies on the map, and viewing the live video image from the monitoring camera on a road or helicopter-carried camera, and so on.
  “Kizuna” communication line makes it possible that we use a system as usual and exchange large size data such as viewing video similar to a ground communication line, even if a disaster occurs.


Information sharing by HDTV conference system utilizing “Kizuna”
  HDTV conference system connected between the disaster headquarters and the operational room of Kochi Prefectural Office utilizing “Kizuna” communication line, and two sites shared disaster information.
  Kochi Prefecture staff remarked that both image and voice were clear and it is effective as a disaster support tool. Therefore, it is ensured that HDTV conference utilizing “Kizuna” communication line is effective for the disaster information sharing.


Disaster headquarters

Operational room of Kochi Prefectural Office

  “Kizuna” communication line makes it possible that more clear images such as printed maps and letters written on a whiteboard are transmitted with Hi-Vision quality. Therefore we are able to share more detailed information.