Honda has worked with Naked since 2002, during which time the agency helped to develop communications and worked with other agency partners on various campaigns.
The car marque said that there is no longer a need for a communications planning agency so has ended its relationship with Naked. Its relationship with media buying agency Starcom is unchanged.
Jeff Dodds, head of marketing at Honda, said: "Over the past two months we have taken the decision to realign our agency model, which means that going forward there is no longer a specific requirement for a communications planning agency.
"Since commencement, Naked Communications has delivered consistently thoughtful and innovative work, and for that we are extremely grateful."
Naked worked with Honda's creative agency Wieden & Kennedy on the popular "grrr" spot, which won the Film Grand Prix at Cannes last year.
"Grrr" was the follow-up to W&K's acclaimed "cog" spot for Honda, which missed out on the Grand Prix in 2003.
In January, Simon Thompson, Honda UK's marketing director, left the company and took up a job in February as pan-European marketing chief of Motorola.
He was at the car marque for 13 years and worked in a number of roles across three divisions: car, motorcycles and power equipment.
In March, Honda replaced Thompson with Dodds, its head of marketing for power equipment.
The below-the-line agency for Honda is Hicklin Slade & Partners.
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .