としたことが means of all people, who would have thought?. It is a JLPT N1 Japanese grammar pattern used to express surprise, disappointment, or mild criticism when someone who is usually reliable, skilled, or high‑status does something unexpected or out of character.
What does としたことが mean?
Use としたことが when someone you hold in high regard does something that doesn’t match their normal behavior. It carries a tone of “How could they of all people do such a thing?” The pattern attaches to a person (or a role, institution) and is immediately followed by a description of the unexpected action or situation.
Natural translations include:
- of all people
- and yet (this person) …
- who would have thought (that they) …
- I can’t believe someone like X would …
The best translation depends on the sentence. The feeling behind としたことが is never just neutral observation — it’s personal, often a little disappointed or incredulous.
How to form としたことが
The grammar attaches directly to a noun that represents a person, role, or entity.
Examples of the pattern:
- あの正直な彼としたことが、嘘をつくなんて
- 一流企業としたことが、こんな単純なミスをするとは
- うちの部長としたことが、会議の日を間違えるなんて
The word before としたことが must be a noun referring to a specific person, a group, or an entity whose reputation is on the line. After it, you typically add a phrase that explains the surprising action, often followed by なんて or とは to underline the tone of disbelief.
When is としたことが used?
Use としたことが in situations like:
- expressing shock or disappointment when someone breaks expected behavior
- gently scolding or sympathizing with someone you respect
- narrating an anecdote where a “model” person slips up
Tone and register:
- semi‑formal to spoken; carries emotional weight, not a dry report
- common in monologues, personal stories, and commentary
- often accompanied by なんて, とは, or ない at the end to emphasize the “I can’t believe it” nuance
If you use としたことが about yourself, it sounds self‑deprecating (e.g., 私としたことが、忘れてしまった ― I of all people forgot). That’s perfectly natural, but be aware it invites the listener to share your surprise.
としたことが example sentences
After reading each sentence, look for the gap between what you expect from that person and what actually happened. That gap is exactly what としたことが expresses.
Nuance of としたことが
The key nuance is emotional reaction to a disappointed expectation. The pattern says more about the speaker’s surprise than about the act itself.
- The speaker holds a certain image of the person — reliable, smart, dignified.
- That image is broken by one specific action.
- としたことが highlights the contrast between the person’s status and their failure.
This is different from simply saying “surprisingly” or “unexpectedly.” It’s personal. You can use it about a close friend, a respected teacher, or even yourself — but not about a stranger you have no expectations of.
In many cases, the feeling is more gentle reproach than harsh criticism. Think of it as “Oh no, you too?” rather than “How dare you.”
としたことが vs にしては
Both としたことが and にしては compare reality to an expectation, but they work in opposite directions.
Common mistakes with としたことが
Another common slip: forgetting to mark the end with なんて, とは, or ない. Without these, the sentence can feel incomplete or lose its expressive punch. Compare:
Is としたことが on the JLPT?
For JLPT preparation, train yourself to feel the “of all people” sentiment the instant you see としたことが. The test won’t ask you to translate it — it will ask you to understand the speaker’s attitude.
Practice questions for としたことが
Keep your first answers short. Once としたことが feels natural, add more context so your surprise comes through clearly.
Learning path for としたことが
Related grammar to review next
- とっさに — because it describes an instant, emotional reaction, often in the same narratives where としたことが appears.
- とりわけ — because it singles out something especially true, similar to how としたことが singles out a person.
- とて — because とて also highlights an unexpected role or case (even a…), though with a broader scope.
- とも～とも — because it frames alternatives, useful in conversations where you debate “whether this person really did that or not.”
Learn としたことが with Hane
If you want to practice としたことが together with the related patterns above, Hane helps you study Japanese in short, focused sessions that build intuition for nuance.
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FAQ about としたことが
What does としたことが mean in Japanese?
としたことが means “of all people, who would have thought” in Japanese. It is an N1 grammar point, and this lesson explains its formation, nuance, example sentences, common mistakes, and similar grammar.
Is としたことが on the JLPT?
としたことが is taught as N1 Japanese grammar in Hane's grammar lesson archive. Review it with examples, usage notes, and related N1 patterns.
How should I practice としたことが?
Read several example sentences, identify the form before and after としたことが, then make your own short sentences and compare it with nearby grammar points.