He returned to Kawaguchi and worked for Kohara Ironworks.  Everyone around him appreciated his growth and his ability as a craftsman. He worked there as a chief to the age of thirty.

In January 1935, he started his company, Kohara Haguruma Kosho (gear workshop) at Nishikicho, Kawaguchi. The Japanese economy at that time was booming as military demands were increasing.

The population of Kawaguchi increased rapidly to 46,000. The town of foundry began to grow into an industrial city.  Tomizo thought now was the right time to start a company, and he carried that out.  His marriage (Tomizo and Fude got married in 1933) was the indirect cause to start a company.

His Nishikicho workshop was very small. It was as small as fifty square meters and perhaps the smallest factory among most of the small factories in Kawaguchi. He lived in there together with his wife. When he started his business, one of his patrons lent him fifty yen and with that money he rented machines for thirty yen a month.

That very fifty yen became the foundation of Kohara Gear Industry Co., Ltd. today.
For two years he worked very hard with two of his employees. It was not unusual that lights-out was the middle of the night.

The current of the times helped him. In 1937, the booming Japanese economy had reached a plateau.  He was able to earn a good income.