Suzuki has been raided by the Japanese authorities as part of an ongoing probe into a fuel economy testing scandal.
Its share price fell over 1.2 per cent on the news.
The Japanese authorities were looking for documents that would concur with the company's claim that it hadn't meant to deceive car buyers.
Last month the carmaker said that an internal probe found its testing methods had not complied with domestic standards since 2010. It said it found "discrepancies" in its fuel economy testing, but fell short of stating it was cheating.
Earlier this week the company released a statement to clarify that it failed to use testing methods that complied with regulations, blaming a lack of manpower. It added it had failed to invest in the necessary infrastructure.
All 16 of Suzuki's models sold in its home market were affected – more than 2.1m vehicles.
Earlier this year Japanese officials raided the offices of Mitsubishi Motors after it had admitted falsifying its fuel economy.
This comes after Volkswagen last year admitted to having installed software into its vehicles to cheat emissions tests, resulting in widespread recalls and hefty fines on the company.
As a result, VW has set aside more than €16bn to pay for the costs of the scandal.