The health ministry and Wakayama Prefectural Government inspected another Kobayashi Pharmaceutical group plant under the food sanitation law Sunday over health problems allegedly caused by the company's supplements.

The inspection of the Wakayama plant of a Kobayashi Pharmaceutical subsidiary in Kinokawa, Wakayama Prefecture, followed a similar administrative action taken at the parent company's plant in the city of Osaka on Saturday.

The health problems, reported from users of Kobayashi Pharmaceutical supplements containing "beni kо̄ji" red fermented rice, may have been caused by puberulic acid, a natural compound derived from blue mold.