TOKYO (AP) — A civil lawsuit accusing Japanese police of racial profiling opened Monday with emotional testimony from plaintiffs who said they were constantly stopped and questioned without good reason.

The case, filed in January by three residents of Japan with overseas ancestry, including an American, claims their treatment constitutes discrimination and violates their human rights.

Japan does not have any anti-discrimination law, nor any laws or guidelines aimed at preventing racial profiling, but the government and the police deny they discriminate and say they are just doing their jobs. They have yet to outline the specifics of their arguments, expected in the next session of court in July. A verdict is expected in about a year.

“We are relaying our feelings, our experiences and our views,” said plaintiff Syed Zain, a Japanese citizen of Pakistani descent, speaking to reporters after appearing in Tokyo District Court.