Kodansha has listed the 8th and 9th volumes of the Sakura Taisen Dainibu manga , both scheduled for release on June 17th , since the 7th volume was released in July 2018.
It's worth remembering that the manga in question is the second part of the Sakura Wars , and it was published in Kodansha's Magazine Great in 2009.
Synopsis:
In an alternate Japan, during the 1920s, people coexist with high-tech robots and strange demonic creatures. In this distant past, we find the duo Sakura Shinguji and Ichiro Ogami. Highly polite and equally clumsy, Sakura is a sweet girl with a strong sense of justice.
The first part of the manga was released in 2003, totaling nine volumes.
Source: ANN