[bump]
4 new locations have been found!
A few weeks ago around January 13th, a twitter user contacted
YAMAHA and asked about the 2nd generation installations. After the locations of install were sent, the user went looking for the locations, and they actually found a location still existent. They also mentioned other locations. Enter:
Yamagata City Hall, Miyama Branch
It seems this location is of the slimmer 2nd generation. I had word that the music siren was installed in 1994 and deactivated in 1996. It also seems the music siren has the
YAMAHA logos on it.
The siren played Humoreque, Home Road, Home Sweet Home, Home on the Range, Brahm's Lullaby, Edo's Lullaby, Clair de Lune, Wild Rose, Gabot(?), and Furusato. When each song played is unknown.
Iwakuni City Hall Kuga General Branch
While
YAMAHA claims one was set up here, it is unknown where it is now, presumably removed. Likewise, the building it resided on is bound to be removed next year. All that's known is that the music siren played the Kugamachi Municipal Song at 12PM. The Bosai Musen unit next to it seems to be its replacement.
Tomika Town Hall
This music siren was removed some time before 2018 and after 2014. And yes, it was caught on streetview. No one has gotten in contact with the city hall yet. The songs and installation date is unknown. It's also unclear if the music siren has the new
YAMAHA logo.
Omiya Town Hall
Once again, this music siren location was removed some time in the early 2000s. The municipal building was moved and has since been renovated, so locating the exact location is basically useless and won't get you anywhere.
Yes, we now have 11 of 12 of the 2nd generation music sirens.
Finally, I revised the graph I sent earlier in May. These are the 9 major regions in Japan.

I believe it's also important to say, the City Hall/Town Hall column could also contain municipal and regional offices such as the Okayama Prefectural Government Office, which would count in the Chugoku region.