A growing number of prefectures have stopped posting disaster warnings on the platform due to limits on the number of free posts allowed.
Japanese local governments, let alone the central one, still have almost zero knowledge about the value of maintaining infrastructure which they should have full control. Virtually even discourses about it do not exist yet. Huge difference between the European governments.
The beauty of that is that knowledge can be transferred :) But i suppose they have to be willing first.
Fax machines are one of the main ways of communications there. I guess floppy disks are indeed partly used at municipal offices yet.