company was building cars, they wrote an urgent letter to the ceo. it was ignored. here s more on the explosive warning with the letter that sadly came to past. reporter: for 45 years, wak such ki worked at the factory in japan. took pride in his work, believing it was for the good of society. translator: it was a good life i had. reporter: in the last decade as demand for small fuel efficient cars skyrocketed, the union he represented began to fear the company was dangerousry cutting corners and compromising safety. four years ago they wrote this letter voizing concerns what they saw as toyota s move to cut costs. outsource critical design work and limit car testing on new models and hire more workers they believed were less qualified. translator: workers without