Simple, Asians are big into a concept called in English simply as "FACE". Saving FACE is defending the company honor and personal honor, and that is all based on name, parentage, and action.
By calling them anything other then Casio they lose massive FACE. Loss of FACE is cause for a fight. Loosing FACE is cause for a variety of actions ranging from apologizing, to quitting a job, loss of social status, to chopping off ones own fingers as punishment, and in rare cases murder or suicide.
Not wise to insult a Asian by abusing their name. Its one of the worse things you can do.
Its a serious social gaff. Very disgraceful to do. Far, far, worse then if I challenge your sexuality or insult your mother in our culture.
Steve