A spacecraft enters orbit when it has enough horizontal velocity for its centripetal acceleration due to gravity to be less than or equal to the centrifugal acceleration due to the horizontal component of its velocity.

It is very difficult to make a mechanical bearing which is atomically smooth and round; and mechanical bearings deform in high-speed operation due to centripetal force.

Tomio Otani, a long-term student of Abbe, translated it thus: At its most basic level, "kyushindo" can be equated with centripetal force.

Abbe had discovered the efficiency of using centripetal force to throw much larger opponents while a student at Dai Nippon Butoku Kai in the 1930s, and it is likely that this discovery led to his further development of "kyushindo" as a philosophy.