Ryuzaburo Kaku, former president of Canon Inc., died Saturday of a heart attack at his home in Tokyo, his family said Monday. He was 75.

The date and location of the funeral services will not be made public, his family said. It has yet to be decided when a company-sponsored funeral service will be held.

Born in Oita Prefecture, Kaku joined Canon Camera Co., the predecessor of Canon, in 1954 and became president in 1977.

During his 12 years as president, he came to be regarded as the true restorer of Canon's fortunes, as he succeeded in diversifying the company and fostering its growth into an international corporation.