Tokyo police and public prosecutors on Friday apologized to the president of Ohkawara Kakohki, a former executive and others after a recent court ruling on a damages lawsuit found their investigations into the machinery-maker were illegal.

Tetsuro Kamata, deputy superintendent-general of Tokyo's Metropolitan Police Department, and Hirohide Mori, head of the Tokyo District Public Prosecutor's Office's public security division, made the apology to President Masaaki Okawara, 76, and others, including Junji Shimada, 72, a former executive, in a meeting at the company's head office in Yokohama.

"We deeply apologize for the great stress and burdens we have caused," Kamata said. "We will do our best to prevent any recurrence," he added, bowing.