Police turned over to prosecutors Tuesday their case against Prince Hotels Inc. President Yukihiro Watanabe, three other officials and the company itself for allegedly canceling reservations for members of the Japan Teachers Union at a hotel without just reason.

The Japan Teachers Union (Nikkyoso), an umbrella group for teacher unions nationwide, reserved about 190 rooms at the Grand Prince Hotel New Takanawa in Minato Ward, Tokyo, in November 2007 for a planned meeting there the following February.

Watanabe, 61, and the three others — Masahiko Koyama, 52, general manager of the Grand Prince Hotel New Takanawa, and two of its managers in charge of management and banquets — have admitted to the allegations, investigative sources said.