Casio was established in April 1946 by Yoshio Wada like Toshio pan engineers in the field of textile technology. The main product is the first piece of good Toshio. The ring used for catching precipitation cigarette called Biwa vertical bar which makes the wearer can smoke a whole cigarette without having to hold it. Since that time Japan had entered World War II. Smoking is so valuable. Toshio invention it is achieved to a certain extent.
After that Toshio and his brother found a calculator that works with electricity at the time of the Business Show Tokyo Ginza in 1949, they saw the opportunity to increase revenue other than sales. Biwa vertical bar By creating a calculator on their own. Most calculators in those days running gear. And the rotation by hand or by motor. I Toshio who have some knowledge of electronics. Began to devise a calculator using a solenoid coil. Calculator table sized book is created in 1954 as a mechanical calculator that works with electric mixer with the Japanese. One significant innovation in his calculator. The adaptation panel that number to only 10 of the original with the number placed in all primary. (Such as the main unit is 1-9 10-90 in the hundreds, tens, it was 100-900, etc.) and innovative one is to reduce the display window to just a single channel. Compared with the other three channels (including channels for the two channels, and output).