～ことか — How Very ...!
An exclamatory ending that expresses a strong, heartfelt emotion — how much, how deeply, or how very something is/was. It usually follows a question word like どんなに, どれほど, or なんと to amplify the feeling. Use it to convey intense emotion such as relief, worry, joy, or gratitude.
Structure
[どんなに / どれほど / なんと] + [Verb/adj plain] + ことか
Examples
この日をどれほど待っていたことか。
Kono hi wo dorehodo matte ita koto ka.
How long I have waited for this day!
どれほど + 待っていた + ことか expresses deep, long-held emotion
あなたに会えて、どんなに嬉しいことか。
Anata ni aete, donnani ureshii koto ka.
How happy I am to be able to meet you!
どんなに + 嬉しい + ことか amplifies the joy
彼が無事だと聞いて、どれだけ安心したことか。
Kare ga buji da to kiite, doredake anshin shita koto ka.
How relieved I was to hear he was safe!
どれだけ + 安心した + ことか conveys intense relief
• Almost always paired with a degree question word (どんなに/どれほど/どれだけ/なんと). • Rhetorical: it is an exclamation, not a real question. • Register: emotional and somewhat literary; common in reflective or written narration.
Commonly confused with
The JLPT rarely asks whether you recognise a pattern — it asks which of several similar patterns fits. These are the ones ～ことか is tested against.
vs ことだろう
ことだろう softens the exclamation into 'how ~ it must be' (conjecture about others); ことか is the speaker's own felt emotion.
vs ものだ
ものだ expresses general truths or nostalgic recollection; ことか is a burst of strong emotion about a specific instance.
More emphasis
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