On October 20, the Logistics Operations Division of the Yokohama City Port Authority and Yokohama Kawasaki International Port conducted an information transmission drill at Yokohama Port simulating a cyberattack.
<Scenes from the training day>
In 2023, following a cyberattack incident at Nagoya Port, the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) formulated safety guidelines based on the Cybersecurity Basic Act, and in March 2025, published a revised version that specifies the matters that port authorities should address.
In response to this, Yokohama Port established the "Yokohama Port Information Security Liaison Council" in May 2025 to create an information-sharing system in which relevant parties can cooperate in the event of a cyberattack to take necessary measures to maintain and quickly restore port functions.
This training exercise was conducted as part of this initiative and took place from 2:00 PM to 4:00 PM on October 20, 2025, with 20 member companies of the Yokohama Port Information Security Liaison Council participating.
<Overview of the training>
The training was conducted under a hypothetical scenario in which "a possible cyberattack incident caused the terminal operation system at one container terminal in the city to shut down, resulting in a prolonged halt to cargo handling and an expected delay in recovery."
Based on this scenario, each company implemented the necessary measures to expedite the restoration of port functions affected by the attack, and conducted training on rapid information transmission based on established communication systems.
This confirmed that rapid information sharing is possible under the above conditions, but it also identified challenges, such as the need to consider the scope and level of information that should be shared.
Going forward, they plan to use these results to facilitate even faster information sharing in the event of a cybersecurity incident, through revisions to response procedures and other measures.
