The Advertising Standards Authority's annual report reveals the top five most complained about adverts in 2016.
Top of the list was an advert for 2 Cheap Cars which featured a Japanese salesman repeatedly saying "ah-so" before switching to "ah-sold" when a customer decides to buy on of the cars.
There were 27 official complaints laid with viewers saying the ad perpetuated racist stereotypes.
The complaints were settled when the advertiser agreed to remove the clip, although they noted that it had been viewed by 10 Japanese people who had not found it racist.
Being Japanese themselves, the directors of the company felt they should have been allowed to express their own culture, the annual report says.