The resumption comes as it revised its internal business guidelines to adhere to new standards set forward in the ministry's review, the company said.

The ministry of Economy, Trade and Industry (METI) trade ministry outsourced the $718 million project to a non-profit group co-founded by Dentsu, which in turn used various subcontractors, including Dentsu, on the job.

Critics said it was a waste of taxpayers' money and showed opaque management of public work.

Dentsu, part of Dentsu Group Inc, halted new bids on METI projects in July while the ministry's review was being conducted and said it would

(Reporting by Ju-min Park and Makiko Yamazaki, editing by Louise Heavens)