Mr. Morita died of pneumonia, according to Sony. He had been hospitalized in Tokyo since August, after returning from Hawaii, where he had spent most of his time since suffering a debilitating stroke in November 1993. More than anyone else, it was Mr. Morita and his Sony colleagues who changed the world's image of the term ''Made in Japan'' from one of paper parasols and shoddy imitations to one of high technology and high reliability in miniature packages.