Cause of death: hepato-cellular insufficiency
Soichiro Honda (本田 宗一郎, Honda Sōichirō, 17 November 1906 – 5 August 1991) was a Japanese engineer and industrialist. In 1948, he established Honda Motor Co., Ltd. and oversaw its expansion from a wooden shack manufacturing bicycle motors to a multinational automobile and motorcycle manufacturer.
Source : Wikipedia