A Japanese firm may have falsely labeled as many as 3.3 million eels as being domestically produced, according to Yomiuri Shimbun

Sanraizu Fuzu, whose grilled eel products were already under investigation in another incident, now faces further scrutiny from the Agriculture, Forestry and Fisheries Ministry. 

Officials are investigating whether the company purchased eels from China and other countries and repackaged them as Japanese products, The Yomiuri Shimbun reported Saturday.

The company sends approximately 3.3 million eels per year to 70 supermarkets and shops in eastern Japan. When government officials visited the Sanraizu Fuzu fish farm, they reportedly found only one of the farm's nine ponds containing eels. The company could not produce documents showing it had bought the feed that was required for eel production.  

A worker at the factory told The Yomiuri Shimbun that it was very rare to see live eels at the factory. Another employee claimed to have seen boxes marked "Product of China" at the facility.