The Tokyo High Court on Monday upheld the convictions of three former executives of Shimizu Corp. who were found guilty of bribing a governor to obtain favorable treatment in bidding on a public works project.

In September 2000, the Tokyo District Court sentenced Teruzo Yoshino, 84, former chairman of the general contractor, to two years in prison, suspended for four years.

Hiroyuki Koyama, 76, and Akikazu Matsumoto, 69, were sentenced to suspended 18-month prison terms.