I thought so too, but Yukihira Soma uses a salmon deba on everything. In his knife box: The said deba, a yanagiba, and a kanto usuba. He sharpens them in his dorm room. We are of course talking about an anime character here, but I really appreciate how the authors put so much detail into the series.
I reckon hitohira strikes a good balance. The brand is synonymous with Nakagawa, Jiro (who is more than willing to be monopolised sans anonymity), exhausts the "anonymous" Kyuzo (who barely can sharpen for anyone else), yet continues to carry Takada no Hamono although Yohei had practically outed himself. That gave me the impression that Aizawa-san is either really shrewd businessman or just a really nice bloke.