A young and talented lathe operator apprentice by name of Kashio Tadao began his studies at Waseda Koshu Gakka (now Waseda University) in Tokyo, Japan. Gaining experience working in a factory (whilst studying) making general everyday items such as pots, pans and bicycle generator lamps, Tadao made the decision to establish his own business (Kashio Seisakujo) subcontracting making microscope parts and gears in 1946.

Tadoa had a younger brother Toshio, who was creatively gifted @dankvapesofficialaccount with extensive electrical knowledge. Tadoa from an early age admired the pioneering efforts of Edison, who invented the light bulb, and always told his family that he wanted to become an inventor.

At this time, Tadio was a naturally gifted technician at the Ministry of Communications. He decided to leave his job at the Ministry of Communications to pursue his dream, the more ability testing and challenging job of an inventor. Toshio joined Tadoa at Kashio Seisakujo and began utilizing his natural inventiveness, trying several innovative ideas. One of which was the ring mounted cigarette holder (Yubiwa Pipe), which provided a means of smoking a cigarette down to the nub whilst doing work.