I looked at the website from which you may have gotten this and looked at the patent document. Aside from being written in terribly stilted and redundant language (maybe a literal translation from Japanese?), and doing little more than describing how practically any electric motor with switched field electromagnets and permanent armature magnets works, the claim seems to be that the switching process makes this motor unusually efficient. Nowhere does it claim to produce more mechanical energy than the electrical energy it consumes.
The website talks of some unspecified "engine" with a COP greater than 1 when using this motor. COP (coefficient of performance) is a term usually applied to refrigerators, air conditioners, or heat pumps, and refers to the ratio of heat transferred (from a colder to a warmer region) to the electrical energy required for that purpose. If that is what is meant here, there is nothing unusual about it; refrigerators and heat pumps have been operating with a COP > 1 for the better part of 100 years.
But this is not what the website is trying to make us believe. It wants us to believe that there is a motor that produces enough energy not only to run itself, but something else besides (i.e., a perpetual motion machine producing free energy that violates not only the 2nd law of thermodynamics, but the 1st law (energy conservation) as well), along with the usual conspiracy theory as to why the manufacture of this remarkable device is being suppressed.
I can assure you, that even if the distribution of this motor were being suppressed by evil forces, physicists and engineers all over the world would be building the Kawai motor from the information in the patent (as the website suggests) and testing it to see if it really produces more energy than it consumes. If it did that, it would be the scientific news of the CENTURY, overturning one of the two most FUNDAMENTAL laws of physics, and Kawai would have a Nobel prize forthwith.
Needless to say, it hasn't happened, and for a very good reason, having nothing to do with conspiracies.