The Control Organization branch in Akitsu-Kō was destroyed by Ragna the Bloodedge in the year 2198, this event was shown in the first chapter of BlazBlue: Chimelical Complex and the first episode of Alter Memory. This is later shown to have a startling effect on the ecosystem as the environment maintenance device of Akitsu can no longer control the weather properly, causing large amounts of snow to pile up. In BlazBlue: Chronophantasma, it was resuscitated by Relius Clover.
The 10th Hierarchical City of Akitsu-Otsu is located right beside this city, the two together from a pair and are simply referred to as Akitsu. They form one of the tree pairs of the twin Hierarchical Cities. Akitsu-Kō’s broken weather system is also influencing Akitsu-Otsu.
- Snow Town – block 13
Important people born in Akitsu
- The 9th Hierarchical City of Akitsu-Kō and 10th Hierarchical City of Akitsu-Otsu are named after the Japanese god and goddess Hayaakitsuhiko no kami and Hayaakitsuhime no kami.
- Judging by the world map in BlazBlue: Chronophantasma (Extend), this Hierarchical City is situated within Russia.