～にほかならない (〜ni hoka naranai)
Explanation
Express that something is 'nothing but' or 'none other than'.
Formation
Verb-plain + にほかならない, い-Adjective + にほかならない, な-Adjective + にほかならない, Noun + にほかならない
Detailed Explanation
The ～にほかならない grammar point is used to emphasize that something is no more or no less than what is specified. It can be seen as a strong way to say that something is 'nothing but' or 'none other than'.
Examples
彼の成功は努力にほかならない。
Kare no seikou wa doryoku ni hoka naranai.
His success is nothing but hard work.
この痛みは寒さにほかならない。
Kono itami wa samusa ni hoka naranai.
This pain is nothing but the cold.
彼の失敗の原因は慢心にほかならない。
Kare no shippai no gen'in wa manshin ni hoka naranai.
The cause of his failure is nothing but overconfidence.
彼女の笑顔は明るさにほかならない。
Kanojo no egao wa akarusa ni hoka naranai.
Her smile is none other than brightness.
Grammar content sourced from hanabira.org.