Ono-Sendai is apparently more like a zaibatsu then solely a cyberdeck manufacturer. In the short story Johhny Mnemonic Ono-Sendai is mentioned as producing a type of diamond analogue which makes one think that they are more of a manufacturer of specific, high tech devices and products which are not usually available to the private sector. What I mean by that is they don't seem to be the Sony of the future.