ことこそ

expression

this is exactly; this for sure; certainly is

Emphatic expression combining こと (abstract thing/matter) with the particle こそ (emphasis/contrast). Used to stress that a particular thing or situation is precisely the case, often in explanations or assertions.

See also: こそ

• 本ほんを読よむことこそが学まなびの第だい一いっ歩ぽです。

  Reading books is exactly the first step in learning.

• 彼かれの言いうことこそ真しん実じつだ。

  What he says is indeed the truth.