Japan's Ministry of Land, Infrastructure, Transport and Tourism asked district courts in Tokyo and Yokohama to impose administrative fines on Nissan Motor Co. Ltd. and Subaru Corp. for altering vehicle emissions data, Kyodo news agency reported Dec. 19.

Nissan and Subaru are among the Japanese auto manufacturers that earlier this year admitted to inappropriately altering emissions and fuel efficiency data during final vehicle tests.

If the courts grant the request, the companies will be fined ¥300,000 or less per vehicle for violating the Road Transport Vehicle Act, the newswire said. The request covers 454 Nissan units and 278 Subaru vehicles, according to the report.

Nissan was also reportedly ordered by the transport ministry to file quarterly reports on its efforts to stop improper testing at its factories after it recalled an additional 150,000 vehicles on Dec. 7, after discovering more errors in its final inspection process.

Subaru in September also disclosed that the data fabrication and improper testing it discovered in its factories extended to speedometer and brake tests.

The car companies did not immediately respond to requests for comment from S&P Global Market Intelligence.

As of Dec. 19, US$1 was equivalent to ¥112.20.