The founding of Aikido Renshinkai and its philosophies can be best
described with quotes directly from the Renshinkai.com website itself:
"Aikido
Renshinkai is based on the
philosophy and techniques that have been passed down from Gozo Shioda
Sensei. Shioda Sensei was a famous martial artist who founded his own
style of aikido.
One of Shioda Sensei’s top students
was Tsutomu Chida Sensei. He was a Japanese style apprentice (uchi
deshi) to Shioda Sensei for 33 years, the longest of any of Shioda
Sensei’s students. In 2008, after retiring as the chief instructor of
the Yoshinkan Aikido headquarters, Chida Sensei went on to form Aikido
Renshinkai."

"Like most styles of aikido,
Renshinkai is firmly rooted in the philosophy of non-aggression. In
Aikido Renshinkai however, following the example left by Gozo Shioda
Sensei, there is usually more focus on learning through personal
experience and training than through philosophical discourse. Yet in
order for non aikido practitioners to understand, Chida Sensei has
explained:
A smaller and weaker person should be
able to use aikido effectively even when confronted by a larger and
more powerful attacker. The point is to train to find one’s strongest
and most centred position, while learning to be sensitive to the
weakness of the attacker.
Through training in the kihon dosa,
Renshinkai’s basic movements, we learn how to be strong and centred
without excess tension or energy, eventually, being able to keep
centred while moving freely and doing techniques.
By training in the
kihon waza,
Renshinkai’s basic techniques, we learn how to find our partners’ weak
points so that instead of struggling against their force we can use the
power of their attack to control them. When force against force is
experienced, the challenge is to learn how to change one’s power and
approach so that as one progresses in aikido there is less and less
power required."
"Aikido Renshinkai is a registered
not-for-profit organization with the mandate to spread the techniques
and teachings of Gozo Shioda Sensei."