At the end of 1956, the brothers decided to unveil their completed calculator in Sapporo, but they ran into a snag when taking the calculator to be loaded onto the plane at Haneda Airport. The person in charge told them that it exceeded the allowable size, and asked them if they could detach the top part. The brothers turned pale. The top part included the display and keys, which were very important for the operation of the calculator. They tried to protest by saying that the calculator could be irreparably damaged, but finally took the machine apart for loading. After arriving in Sapporo they put the calculator back together, but just as they had feared, it no longer worked. They tried in vain to repair it, but it was completely unsalvageable. Although they went ahead with the presentation using slides, it seemed to end as a failure.

Just as the brothers arrived home, somewhat discouraged, a representative from Uchida Yoko Co., Ltd., paid them a visit and asked to see the calculator. The branch manager who had seen the presentation in Sapporo had told his head office to investigate the new invention. Since Uchida Yoko had subcontracted work to Kashio Seisakujo in the past, the company already had confidence in the Kashio brothers. Now seven years of hard work in development had suddenly paid off. A contract was signed with Uchida Yoko as the exclusive dealer, and in June 1957, Casio Computer Co., Ltd., was established as the development and production company for the relay calculators. The brothers asked their father, Shigeru, to fill the position of President, which he accepted.