https://www.watchtime.com/wristwatch-industry-news/people/in-memoriam-kazuo-kashio-casio-chairman-and-ceo-1929-2018/ (https://www.watchtime.com/wristwatch-industry-news/people/in-memoriam-kazuo-kashio-casio-chairman-and-ceo-1929-2018/)
https://www.tecmundo.com.br/mercado/131753-kazuo-kashio-presidente-fundadores-casio-morre-89-anos.htm (https://www.tecmundo.com.br/mercado/131753-kazuo-kashio-presidente-fundadores-casio-morre-89-anos.htm)