1.
three years ago; the year before the year before last
More formal equivalent of 三年前. Used in written and formal spoken contexts.
一昨昨年の夏だった。
It was the summer three years ago.
一昨昨年から計画していた旅行だ。
It's a trip we'd been planning since three years ago.
一昨昨年の売上と比較すると、大幅に増加している。
Compared to sales from three years ago, there has been a significant increase.
A formal time expression for "three years ago." Follows the pattern of 一昨年 (two years ago) by adding another 昨 prefix. In everyday conversation, 三年前 is far more common.
RELATED TIME WORDS:
- 去年: last year
- 一昨年/一昨年: two years ago
- 一昨昨日: three days ago
USAGE:
Primarily appears in formal writing such as reports, articles, and official documents. In speech, speakers almost always use 三年前 instead.