all japan fire radios went to digital in 2016

Fire and ambulance service radio, which had been operated in analog
format, was decided to switchover to digital by the end of May 2016
when criteria for the Radio Act (Directive from the Ministry of
Internal Affairs and Communications) were revised in 2003. As a
result, fire departments completed this digitalization on time, taking
renewal timing of radio equipment into consideration.1 This
digitalization was a quite difficult, large project, but an
information infrastructure for fire and disaster prevention could be
developed with the rapid progress in IoT and with the AI era also
expected to arrive.

from http://www.kaigai-shobo.jp/pdf/201808_70yearMunicipalFire.pdf