Kazuo Kashio, a Founder of Casio Computer, Dies at 89 – The New York Times

One of four brothers who organized the company in postwar Japan, he marketed the mini-calculator, the G-Shock watch and other innovations.
— Read on www.nytimes.com/2018/06/20/obituaries/kazuo-kashio-founder-casio-computer-dies-at-89.html