TOKYO (AP) — A group of Japanese doctors has filed a civil lawsuit against U.S. search giant Google, demanding damages for what they claim are unpoliced derogatory and often false comments.

The lawsuit, filed Thursday in Tokyo District Court, demands 1.4 million yen ($9,400) in damages for 63 medical professionals.

Google said in an emailed statement Friday that it is working “24 hours a day” to reduce misleading or false information on its platform, combining human and technological resources “to delete fraudulent reviews.”

The lawsuit claims groundless negative reviews have been posted on Google Maps, a very popular app in Japan, that allows people to write in ratings of various institutions and their personal reviews.

Some comments are irresponsible and appear to be written out of spite and the “word of mouth” remarks take on a life of their own and are nearly impossible to refute, according to the lawsuit.