一昨年(いっさくねん)

いっさくねん
noun
the year before last
formaltime-general
1. the year before last
The year two years ago from the present. More formal than the colloquial おととし.
一昨年(いっさくねん)の夏(なつ)に引(ひ)っ越(こ)した。
I moved the summer before last.
一昨年(いっさくねん)から日本語(にほんご)を勉強(べんきょう)している。
I've been studying Japanese since the year before last.
一昨年(いっさくねん)の売上(うりあげ)と比(くら)べると、今年(ことし)は大幅(おおはば)に増(ふ)えた。
Compared to sales from the year before last, this year's have increased significantly.

Usage

一昨年(いっさくねん) is the formal reading used in writing and formal speech. The colloquial equivalent is おととし, which is more common in everyday conversation. Both mean the same thing.

Related time words

Related Words

Related: おととし (year before last)
Related: 去年(きょねん) (last year)
Related: 今年(ことし) (this year)
Related: 来年(らいねん) (next year)
Related: 再来年(さらいねん) (year after next)
Related: 一昨日(いっさくじつ) (day before yesterday)
Related: おととい (day before yesterday)
Related: 一昨昨年(いっさくさくねん) (three years ago)
general
Added 2026.3.7 17:55 · Revised 2026.9.2 13:01
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