noun which may take the genitive case particle 'no'
one rank above; a cut above; next level
Used to describe something that is distinctly better or of a higher grade than the standard or than something else. Often used in marketing, reviews, or comparisons.
このレストランはワンランク上の味を提供している。
This restaurant offers a taste that is a cut above.
ワンランク上のサービスを目指しています
We aim for a higher level of service.