4: 1971-75: I spent most of my time in the machine shops getting grease and oil all over my clothes, where I became absorbed in solving problems that troubled the shop floor (Gemba) and in research to test newly developed tools and processes.

My superior Watanabe said, "It takes time to resolve problems in cutting and grinding technology and there is not much theoretical backing to the measures we take. Doi-kun, I want you..."

5: 1972-74: Development of a cutting tool with good chip control functions

The research we did to find ways to break chips finely without heating the cutting edge paved the way for the die press-type chip breaker with a chip control that is now widely used in the world...

10: 1973:An example of the irresponsibility of the Isuzu organization, measures to resolve problems in the start-up and measures to improve operational availability rate of the transfer machines for new large V-type diesel engine connecting rod machining- I

The section chief of Manufacturing Engineering at Isuzu said, "If we adopt Doi's proposal and it doesn't go well, then Isuzu must take responsibility. However..."

11: 1974:An example of the irresponsibility at Isuzu organization, measures to resolve problems in the start-up and measures to improve operational availability rate of the transfer machines for new large V-type diesel engine connecting rod machining- �U

Since the company had grown dependent on the machine manufacturers, it could not come up with any ideas for improvement. Consequently, they always ended up asking me "Doi-San, can you help us find a way to do something about this situation?"