A transgender woman was referred to prosecutors Thursday for suspected trespassing after using the women's washroom in a commercial facility in Osaka, in a case an expert on LGBT issues fears might lead to more prejudice and discrimination against sexual minorities.

According to the Osaka Prefectural Police, the commercial facility contacted police after a customer complained that she could not use the women's restroom because "a man wearing women's clothes was using it," causing her "fear."

The transgender woman in her 40s, who police later confirmed had entered the ladies' room in May last year, has told investigators she knew she was not supposed to use the facility because her gender is listed as male on her family registry.