Tokio Marine & Nichido Fire Insurance, Sompo Japan Insurance, Mitsui Sumitomo Insurance and Aioi Nissay Dowa Insurance, will report the findings to the Financial Services Agency by Friday, the Nikkei reported, without saying where it got the information.

The FSA had ordered them to look into their business practices following allegations they colluded on premiums for some corporate clients.

It will consider imposing administrative penalties on the insurers if they are found to have violated industry regulations to ensure fairness and customer protections, the Nikkei said.

(Reporting by Makiko Yamazaki; Editing by Jamie Freed)