Meanwhile, Dentsu has reported a 1.7 per cent fall in consolidated billings and a 10.7 per cent fall in operating income for the year ending 31 March. Profits were down 0.9 per cent.
Dentsu has blamed the slowing US economy and a rise in the cost of raw materials on falling client spending in Japan.
As a whole, Japan's advertising industry grew by 1.1 per cent in 2007 year-on-year, but spend in the four major traditional media fell for the third consecutive year, by 2.6 per cent.
The slump in traditional media was offset by sharp rises in advertising online, satellite TV and "promotional" media.