Former House of Councilors member Takao Koyama was served another arrest warrant by public prosecutors on Tuesday on suspicion of having an affiliate of scandal-hit mutual-aid foundation KSD pay the salaries of his two secretaries.

Koyama, 57, is suspected of having the KSD affiliate pay a total of 11.66 million yen in salaries for his two private secretaries on 21 occasions between January 1999 and September 2000, the Tokyo District Public Prosecutors Office said.

In return, Koyama, then parliamentary vice minister of the old Labor Ministry, allegedly lobbied to increase government subsidies for the Institute of Technologists, which was promoted by KSD from July 1998 to October 1999, prosecutors said, adding that Koyama has admitted the charge.