とはな

to think that…

→ と
phrase Rare #35,148
to think that… Expresses surprise or disbelief, often at the end of a sentence.
JA: 彼が一人でやったとはな。
EN: To think he did it all by himself.

スウェーデンの首都がストックホルムだとはな。

I can't believe Sweden's capital is Stockholm.

交通事故とはな

A traffic accident, huh.

— マルホランド・ドライブ (2001)

この私が夢とはな

To think that I, of all people, was just a dream...

— The Garden of Sinners: Paradox Spiral (2008)

切手収集してたとはな。

I never knew you collected stamps.

この私が夢とはな…

To think that this is all just a dream...

— The Garden of Sinners: Paradox Spiral (2008)