Year Before Last
noun
Remember how 一昨日 means "day before last"? Similarly, one year previous to that year is the year before last.
おととし, いっさくねん
The last time you tossed something into a trash can was the year before last. Why? Because you got a trash can with an auto tossing (おととし) feature. What amazing technology!
一昨年の市長って誰だったっけ?
Who was the mayor two years ago again?
一昨年から毎日ジョギングをしています。
I have been jogging every day since two years ago.
一昨年、ハウステンボスでハウステンボス歌劇団のショーを見てきました。
The year before last, I saw a show by the Huis Ten Bosch Revue in Huis Ten Bosch.