The account is currently split between Initiative for media planning duties and Asatsu-DK and Hakuhodo for media buying. In all the business is estimated to be worth around $120m.
Initiative will defend the account and shoot it out against MindShare and the two Japanese incumbent agencies in a winner takes all pitch for the combined account.
According to Media Asia, presentations for the the business took place at Unilever's headquarter's in Tokyo last week.
The review follows similar processes by Unilever in Indonesia and Australia over the past year.
Unilever's brands in Japan include Brooke Bond, Dove, Lipton, Lux and Ponds among others.
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