Translation guide
The English adverb 'unexpectedly' describes something happening in a way that was not anticipated. In Japanese, this concept is expressed through various adverbs and phrases that convey surprise, suddenness, or a deviation from expectations. The choice depends on whether the focus is on the speaker's surprise, the suddenness of the event, or the contrast with what was expected.
Expressing that something happened differently from what was expected or assumed, often with a nuance of surprise.
The most direct equivalent for 'unexpectedly' when something turns out contrary to expectations. Often used when the result is surprising but not necessarily negative.
試験は意外に簡単だった。
The exam was unexpectedly easy.
He came back unexpectedly early.
Similar to 意外に, but often implies a more casual or subjective surprise. Commonly used in spoken Japanese.
この仕事は案外楽だった。
This job was unexpectedly easy.
Literally 'without having thought', this adverb emphasizes the unexpected nature of an event, often with a positive or neutral connotation.
思いがけず旧友に会った。
I unexpectedly ran into an old friend.
Means 'suddenly' or 'unexpectedly', often used when something happens abruptly and catches one off guard. Slightly literary.
不意に雨が降り出した。
It unexpectedly started raining.
Focusing on the abruptness or lack of warning, rather than the contrast with expectations.
The most common word for 'suddenly' or 'unexpectedly' when emphasizing the abruptness of an action or event.
彼は突然部屋を出て行った。
He unexpectedly left the room.
突然の訪問で驚いた。
I was surprised by the unexpected visit.
Means 'suddenly' or 'abruptly', often used for changes in state or actions that happen quickly and unexpectedly.
急に寒くなった。
It got unexpectedly cold.
Implies something happening without any prior notice or preparation, often with a nuance of rudeness or surprise.
When something unexpected happens due to chance or coincidence, not necessarily contrary to expectation.
When something happens unexpectedly and it is unwelcome or contrary to one's hopes.
Means 'unfortunately' or 'unexpectedly (in a bad way)'. Used when an unexpected event is inconvenient or disappointing.
あいにく雨が降り出した。
Unfortunately, it started raining unexpectedly.
Kanji form of あいにく, more common in written language.
Both mean 'unexpectedly' and are often interchangeable. 意外に is slightly more objective and can be used in formal contexts, while 案外 is more subjective and casual. 案外 often implies that the speaker's personal expectation was overturned.
意外に難しい問題だった。
It was an unexpectedly difficult problem.
案外簡単にできた。
I was able to do it unexpectedly easily.
English 'unexpectedly' can sometimes be rendered more naturally with a different structure in Japanese. For example, 'He died unexpectedly' is often expressed as 突然亡くなった (suddenly passed away) rather than using 意外に, which might sound odd for a death.
彼は突然亡くなった。
He died unexpectedly.
いきなり彼が現れた。
He appeared unexpectedly.
たまたま通りかかった。
I happened to pass by unexpectedly.
生憎の雨で試合が中止になった。
The game was canceled due to unexpected rain.