As was hinted to in the comments, it seems that "Bushin Ryu" is a freestyle martial art that is a combination of various other arts, with components of Jiu-jitsu, Ninjutsu, Aiki Jujutsu, Aikido, Hapkido, Karate and Kobujutsu (Japanese Classical Weapons Training).
source: Bushin Ryu Aiki Bujutsu - 'School of the Samurai'.
From what I understand, there is no real technical focus, and it blends various martial arts into something new. I think the following quote makes clear that there is no clear focus present in this style:
[Bushin Ryu is a] self-protection [discipline] that includes an extensive variety of strikes, kicks, joint locks, throws, pressure points, ground survival and disarming techniques. The result is a practical, comprehensive self defense system that is enjoyable to learn and truly effective in realistic situations.
source: Bushin Ryu Aiki Bujutsu
It does, however, seem to strive to conserve the classical way of Japanese Samurai training:
[The] school of authentic Japanese Bujutsu [is a] self-defense-based
Japanese martial arts emerging in the modern era but taught in the
tradition of the feudal era [...]
source: Bushin Ryu Aiki Bujutsu World Federation
This latter contrasts with another freestyle self-defense system composed of various other disciplines, namely the Israeli Krav Maga. Krav Maga is focused on real-life practical solutions for self-defense techniques designed for the Israel Defense Forces (and other military forces). Krav Maga is therefore focused on efficiency, while Bushin Ryu has a strong focus on the classic Japanese budo.