Casiois a Japanese multinational electronics manufacturing company headquartered in Shibuya, Tokyo, Japan. Its products include calculators, mobile phones, digital cameras, electronic musical instruments, and analog and digital watches. Casio was established as Kashio Seisakujo in April 1946 by Tadao Kashio, an engineer specializing in fabrication technology. Kashios first major product was the yubiwa pipe, a finger ring that would hold a cigarette, allowing the wearer to smoke the cigarette down to its nub while also leaving the wearers hands free.