From the afternoon of the 21st, numerous companies and municipalities announced emergency maintenance for their websites, business tools, games and other services, raising the possibility that some service features would become unavailable. No unauthorized access has reportedly been identified as of now.
From the afternoon of 21 October, companies and municipalities announced that they were carrying out or planning emergency maintenance simultaneously, with the affected services spanning a broad range of industries.
The services affected include Kaonavi, an HR management system, Sakura Rental Server, the cloud version of Garoon, BOOK☆WALKER, BookLive, BOOTH, Umamusume: Pretty Derby and Pokémon Champions, as well as official municipal websites.
Some companies explained that the emergency maintenance was for a planned system update, and no unauthorized access or damage had been confirmed as of that point. FC Tokyo posted that it had not confirmed any damage from unauthorized access or tampering as of that point, while BookLive likewise explained that there had been no unauthorized access and that the purpose was to upgrade its system.