Mitsubishi Motors has reportedly been ordered to pay a ¥485 million (£3.4m) fine for making false claims about the fuel efficiency of its cars.
It comes after the car manufacturer last year admitted to falsifying fuel consumption tests in more than 600,000 cars sold in Japan.
The vehicles affected were models eK Wagon, ek Space, Dayz and Dayz Roox, with the latter two supplied by Nissan.
The Consumer Affairs Agency said product catalogues and websites for vehicles sold by the carmaker carried misrepresentations of their fuel economies.
Reports claim the car manufacturer’s President Tetsuro Aikawa and Executive Vice President Ryugo Nakao are to step down following the scandal.
Earlier this month Volkswagen pleaded guilty to falsifying emission tests and agreed to pay a record $4.3 billion (£3.5bn) in fines in the US.
The US Environmental Protection Agency (EPA) also issued a notice of violation to Fiat Chrysler Automobiles (FCA) for allegedly cheating emissions tests.