Mitsubishi didn’t hire any physically handicapped employees. It was not uniquely evil in this regard. Pretty much all Japanese companies didn’t hire physically handicapped employees. We had stairs to climb and it didn’t create any problem for us. We were all physically capable of climbing strairs.
One day some construction work started in our building. Elevators, signs in English, ramps etc. We were not allowed to go there. Found out that a few Western executives were going to visit our computer works.
The western executives came, used the newly constructed entrance, and were impressed with the accessibility for the handicapped.