Japan, March 7 -- Japan's eight telecommunications companies - Nippon Telegraph and Telephone Corporation, NTT East, NTT West, NTT DOCOMO and NTT Communications (the NTT Group), KDDI Corporation, SoftBank Corp. and Rakuten Mobile - conducted on-site training for the joint use of marine vessels from March 4 to 7, 2025, as part of their cooperative framework launched on December 1, 2024, aimed at ensuring the rapid restoration of communication networks in the event of large-scale disasters. The drill was held in Nagasaki City, Nagasaki Prefecture.The training was conducted on the cable-laying vessel KIZUNA, which is owned by the NTT Group. Mobile network operators conducted training for the installation of shipboard base stations from March 4...