〜にほかならない ni hoka naranai
〜にほかならない（ni hoka naranai）means “is nothing other than; is precisely; is none other than”. A strong, emphatic way to assert that something is exactly X and nothing else. Formation: N + にほかならない（連体は ほかならぬ + N）
is nothing other than; is precisely; is none other than
N2Formation
N + にほかならない（連体は ほかならぬ + N）
Explanation
A strong, emphatic way to assert that something is exactly X and nothing else. The speaker rules out other possibilities and declares the one true cause, reason or identity with conviction. Common in writing and formal speech.
Examples
Note
To modify a noun directly, use ほかならぬ + N (例:ほかならぬあなたのお願い = a request from none other than you). Often follows 〜からにほかならない to assert the sole reason.
FAQ
〜にほかならない — what does it mean and how is it used?
is nothing other than; is precisely; is none other than. A strong, emphatic way to assert that something is exactly X and nothing else. The speaker rules out other possibilities and declares the one true cause, reason or identity with conviction. Common in writing and formal speech.
〜にほかならない — how do you form it?
N + にほかならない（連体は ほかならぬ + N）
〜にほかならない — any usage notes?
To modify a noun directly, use ほかならぬ + N (例:ほかならぬあなたのお願い = a request from none other than you). Often follows 〜からにほかならない to assert the sole reason.