An HIV-positive man being held at a detention center in Kyoto has filed a petition accusing the center of discriminatory treatment due to his medical condition, officials of a local bar association said Saturday.

The Kyoto Bar Association has started an investigation into the accusation, they said.

According to the petition, the man is in his 30s and has been held in solitary at the detention center in Kyoto's Fushimi Ward since early February. Being held in solitary has enabled other people at the facility to determine his health status, he claims.

The petition says the man is forced to use a basin with "HIV" written on it, as well as use separate plates and utensils for meals, and that he must wash them and keep them to himself so they do not get mixed up with other inmates' plates.