Even if critics say the IS-F does not distinguish itself enough from the current IS, especially with the interior, Lexus says that the first attempt of a performance car will establish a special design identity with the future "F" models.

"We have to establish our own identity as a Lexus premium brand," Hirai says at an event here during the Tokyo auto show. "Maybe we will put some flavor or dynamics, or more emotion, toward (F models) than the basic Lexus design."

The new "F" model is Lexus’ first shot at challenging the dominance of competitors such as BMW AG’s M and Daimler AG’s AMG performance marques.

For one thing, Lexus can be more aggressive in designing its F cars than the German brands, Hirai says. "They appreciate consistency, or continuity, very much. We like to make (our vehicles) a different way."